How to protect a car body from corrosion - Metals and their processing

Anti-corrosion treatment of a car - materials for protecting the body from corrosion with your own hands

Don't let it get to this point!

The problem of corrosion on the car body worries many car owners. This nuisance threatens not only vehicles that are stored on the street, but also those that are in the garage.

This was confirmed by the results of independent studies of more than 100 cars of various brands and models, no earlier than 1998, conducted by the magazine “Vi Bilagare”.

Experts from the Swedish Corrosion Institute confirm that traces of it can be found after 3 years of use on all cars without exception. This means that protecting your car from rust takes almost first place after protection from theft.

To understand how to protect a car from corrosion, you need to understand the reasons for its occurrence.

The best anti-corrosion agents for hidden surfaces

Among such anticorrosives, those that have an oil base stand out. Also available with paraffin content. This ensures a constant liquid form of the composition, which allows you to thoroughly treat even microcracks that are difficult to see with the naked eye.

In addition, such products have a long service life, but they lack mechanical strength. For this reason, they are not used for exterior body treatment.

Hi Gear - the best product for finishing seams

The base is rubber, so this type of coating significantly increases the service life of body parts. During processing, the surface is covered with a kind of film that has excellent water-repellent properties. The product not only has good anti-corrosion properties, but also provides protection against chemicals used to treat road surfaces. Often used to protect seams and joints.

The advantages include the following properties:

Contains corrosion inhibitors.
It has good noise reduction and thermal insulation properties.
Thanks to its excellent elasticity, it does not crack even after long periods of use.
Suitable for surface treatment of welds of any type.

Consumers also note some disadvantages of this product:

During initial treatment, it is necessary to apply a double layer of protective agent.
It has low effectiveness if the surface being treated is heavily rusted.

The product is in high demand among consumers who have new cars. There are also many positive reviews from car owners with used vehicles in good condition.

Noxudol – providing excellent sound insulation

This product was developed by the Swedish manufacturing company Auson a long time ago. This composition differs from other similar materials on the market in that, in addition to reliable protection of body elements from corrosion and mechanical influences, it provides high-quality noise absorption.

The product is produced in two forms - one is intended for individual use, the second is used mainly at service stations.

The substance is suitable for treating any body part, including internal elements, underbody, etc. Mainly used to coat internal parts. The main disadvantage is the long drying time of the product.

Since this anticorrosive agent has a very thick consistency, individual processing becomes inconvenient and time-consuming.

According to user reviews, this tool has the following advantages:

A wide range of protective substances for processing metal elements of a car.
Availability of special quality certificates, production in accordance with all European standards.
Possibility of purchasing containers both for individual use and for large professional works.
Good level of sound insulation.

The disadvantages include:

It takes a long time (up to three days) to dry after initial processing.
Before processing, it is necessary to carefully insulate the electrical wiring.

A large number of buyers choose anti-corrosion products of this brand.

LIQUI MOLY – excellent value for money

These products are widely known both among Russian car owners and abroad. The advantage of this anti-corrosion agent is that it has an optimal price, which is combined with high quality. The product has excellent protective properties and is elastic.

The most effective solution would be to apply two layers of this anticorrosive agent. The product was produced in Germany. In addition to anti-corrosion products, the manufacturer offers a wide range of various products for caring for metal parts of cars.

We recommend: How to replace the cabin filter of a UAZ Patriot with your own hands?

Source: https://AutoManya.ru/sovety/antikorrozijnaya-obrabotka-avtomobilya.html

How to treat a car body for the winter

Winter is a harsh time for any car, regardless of whether it is new or not. One month of car operation in winter can be easily compared with one year of summer operation. Winter slush, the formation of a mixture consisting of water, salt, sand - all this is covered in layers on the body, forming a favorable environment for the development of corrosion.

Even high-quality anti-corrosion treatment of the car body, performed at the factory in a new car, will not be able to fully resist the worst enemy of metal. For this reason, it is worth considering the question of how to treat the car body for the winter . The protective equipment will protect the car body from corrosion and ensure trouble-free operation of the car in winter.

Preparing the machine for winter operating conditions

Winter brings many problems to every motorist. As the temperature drops, the car is affected by many negative factors: humidity, salt, chemicals, temperature changes, ice.

Therefore, at this time of year, the car body is in great need of protection and care; at negative air temperatures, the paintwork becomes fragile . Pebbles from under the wheels of neighboring cars instantly leave chips.

Many people do not ask themselves how to treat a car body for the winter , believing that it is not necessary and limit themselves only to:

Replacing summer tires with winter ones;
Recharging or replacing the battery;
Filling with antifreeze wiper fluid;
Replacing wiper rubbers.

And the body is looked after after winter is over. However, this is a big misconception. When using a car year-round, you need to constantly take care of it. Before winter, it is imperative to inspect the car for chips, scratches, and remove them. In the future, these may be areas of corrosion , especially when exposed to salt and road chemicals.

The car body requires constant protection, so you need to know how to treat the car body for the winter so that it is not damaged by rust. However, metal is not the only material that can be exposed to aggressive environments at subzero temperatures.

They need protection and careful care:

Car windows are subject to frost. After winter, many glasses are covered with many scratches. Read how to defrost a windshield .
Car paintwork. At subzero temperatures, paintwork becomes brittle and microcracks and chips easily form.
Wheel arches of the car. The wheels of the car spin quickly, throwing away pebbles with salt and road reagents, all of which hits the body with powerful destructive force, destroying the top layer.
Rubber seals and plastic.
Door locks. Moisture that gets inside the keyhole makes it difficult to open. To prevent this from happening, read the article - how to lubricate car door locks in winter .
And of course the body itself.

It is important to know how to care for your car in winter and before the onset of frost. How to treat a car body for the winter? The surest way to protect is anti-corrosion treatment . Winter has already arrived, and if you haven’t already, you have something to think about!

If you have problems with the body, sign up for repairs at a car service center.

How to treat a car body before winter

During the winter season, the car body is constantly exposed to salt and road reagents. As a result, clouding of the varnish and chrome parts, microcracks, and swelling of the paintwork occurs. This dangerous mixture accumulates on the body, penetrates into cracks in the paintwork, into seams, resulting in a corrosion process and traces of rust appear.

Anti-corrosion treatment of the car body will preserve the appearance of the car and delay the aging of the metal and paintwork.
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Types of anti-corrosion treatment of the car body

Let's consider the means for processing the car body:

Anticorrosive;
Bitumen mixtures;
Polishes;
Wax;
Special pastes that prevent the occurrence of static electricity;
Anti-gravel film.

Salt and road reagents, which are sprinkled on our snow-covered roads, are the worst enemies of the car body in winter. And if we add high humidity and constant temperature changes, then the car is guaranteed a place in the landfill, unless it is properly cared for.

Let's take a closer look at how to treat a car body for the winter in order to protect it from the “winter cocktail”.

Anticorrosive

The bottom of the car and wheel arches are open and are constantly exposed to salt and reagents. As a result, corrosion processes quickly spread.

Protecting the car body for the winter with anticorrosive is an effective method that allows you to limit the process of corrosion formation as much as possible. Today, the market is represented by a variety of such anti-corrosion treatment products. They are divided depending on the composition and purpose, for processing hidden and external surfaces.

Possessing high penetrating ability, it completely saturates rust , displaces moisture from it, and slows down the corrosion process. We recommend choosing an oil-based product that effectively penetrates and inhibits the corrosion process.

Be sure to thoroughly wash the car body before treating it for the winter. It is very important to remove all the dirt. Treatment in the presence of oil and gasoline leaks is also unacceptable.

Bitumen mastic

One of the ways to treat a car body for the winter. The bitumen-based mixture contains resin. Bitumen mastic is used exclusively as a preventive measure ; it cannot fight corrosion processes. The main task is to extend the life of the car body. Typically, a bitumen-based mixture is applied to the underbody and wheel arches of the car.

Due to the affordable price, many car enthusiasts resort to this method, and treating the body with bitumen mastic with your own hands is not so difficult. The main condition is that the surface of the body is cleaned of dirt and corrosion. Otherwise, moisture getting under the mastic will cause rust, and the work will be in vain.

How to treat the underbody of a car with your own hands? Before processing, it is necessary to wash the bottom of dirt and clean the body of reagents. Then existing pockets of corrosion are removed. For this purpose, you can use a scraper or a wire brush.

https://www.youtube.com/watch?v=cDrUiUXBZ2U

It is necessary to apply a primer to the cleaned surface. If there are old layers of mastic and they peel off, they also need to be removed. Then bitumen mastic is applied to the bottom of the car with a brush.

Polish

The car body is regularly exposed to aggressive environments, so the paintwork requires regular protection. How to treat the car body for the winter? For these purposes, you can use polishes that create a film on the surface of the paintwork. It not only adds shine, but also protects the paintwork from scratches and aging. Polishing is an excellent way to protect your car's paintwork yourself.

Based on their composition, polishes are divided into:

Polishes only add shine, but provide reliable protection of the body from aggressive reagents in winter.

Wax

Wax-based mixtures are perhaps the most inexpensive, but also quite reliable means of polishing and protecting the car body . Minimum effort and high results. However, it is worth considering that the effect of wax is short-lived and must be renewed regularly.

We recommend waxing the car body as a preventative measure. By choosing the right hard wax, you will provide truly excellent body protection both before and during the winter.

Anti-gravel film

How to treat the car body for the winter to protect against particles of gravel, sand, and crushed stone flying out from under the wheels, which form scratches, chips, and cause the development of corrosion? If you want the body of your car to always look 10 points, then anti-gravel film is what you need for this.

A special protective film is glued to the car body, which itself is transparent and does not spoil the appearance of the car. It is glued to those parts of the body that are most exposed to the environment: threshold, bumper, doors, hood. The film takes all the impacts, protecting the body.

Treating the car body for the winter in this way will provide reliable protection against corrosion . It has a long service life, and besides, it is practically invisible. It has a transparent structure and is easy to clean; if necessary, it can be easily removed.

Anti-corrosion treatment of a car body for the winter must be performed at a temperature of at least 18 degrees . Don’t forget to wash your car regularly to remove road reagents and salt from the surface of the body, so they will not have time to penetrate through microcracks.

Car washing in winter

The main way to combat premature aging of a car body is constant hygiene and care , especially if it’s winter outside. But you shouldn’t overdo it when washing your car.

Often, car owners stop visiting car washes with the onset of winter, citing the fact that the car will still become dirty in a short time. This attitude will not give a good result.

All dirt sticks and dries on the car body. Moisture, along with road chemicals, penetrates through cracks in the paintwork and causes corrosion. That is why it is necessary to wash the car, washing away all deposits from the surface.

Tips for washing your car in winter:

Do not use hot water; due to temperature changes, cracks may appear;
When washing, clean the fender liners more thoroughly;
When washing, use special car shampoos; they effectively remove dirt;
After washing, the car must be wiped dry;
Lubricate door locks and rubber seals with silicone grease.

It is imperative to visit a car wash during a thaw and after heavy snowfall, since it is at this time that the car body is heavily exposed to salt and road reagents that are used to treat our roads.

Conclusion

From this article we can conclude that it is necessary to prepare the car body for winter, and this is achievable with minimal investment of time and money. How to treat the car body for the winter - the choice is yours. Each method has its own advantages and disadvantages and price. Even though winter has arrived, it is not too late.

Take care of your iron friend, and he will respond to you with loyalty for a long time!

Source: https://auto-word.ru/chem-obrabotat-kuzov-avtomobilya-na-zimu/

Protecting your machine from corrosion

Corrosion is such an aggressive and active process that traces of it can be found even on cars that have recently left the assembly line. If the car is several years old, rust can already appear quite actively, but the intensity of the process depends on many factors: operating conditions, types and methods of anti-corrosion protection used, thoroughness of processing and a number of other conditions.

Protecting a car from corrosion begins during its manufacture. Some manufacturers galvanize metal parts. Previously, we wrote about how to change the oil on a Skoda Fabia, and so, its body is galvanized both outside and inside.

Protecting your car from corrosion by galvanizing

Today, galvanizing is the most effective method to minimize the processes of destruction of steel body parts. But even galvanizing does not prevent, but only delays corrosion. Therefore, galvanized parts are primed with special compounds (a special primer for galvanizing is used), and only after that they are covered with enamel, which, in addition to aesthetic purposes, also plays the role of an anti-corrosion barrier.

Even such seemingly reliable multi-layer protection sooner or later gives in under the pressure of corrosion and the metal begins to deteriorate. In order to notice and eliminate pockets of rust in time, you need to carefully inspect the car on an overpass or in a pit at least once every six months. If there are stains or streaks of rust, you need to start preventative work.

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Corrosion is an aggressive and active process

Protection of the car underbody from corrosion

The bottom of the car is usually the first to be damaged by rust, because it is on the bottom when driving that most of the sand, crushed stone, and water that fly from under the wheels occur. The bottom hits curbs, stones, and other protrusions when overcoming obstacles, tearing off or compromising the integrity of the anti-corrosion layers. Therefore, protecting the underbody of a car is an important part of the fight against corrosion.

Protecting your car's underbody from corrosion starts with cleaning.

Having driven the car onto an overpass or into a pit and carefully examined the bottom, we begin with cleaning. For ease of processing, it is better to remove the wheels and cover the discs or drums and brake pads with casings. It is not advisable to process the muffler, driveline drive and cables, so they should be covered with thick paper and/or adhesive tape.

Now the bottom needs to be washed thoroughly, possibly using detergents. Hidden cavities require special attention (after cleaning, do not forget to clean their drain holes). After the dirt has been removed, the car must be allowed to dry (to speed up the process, you can spray it with air from a compressor, or you can just wait).

The next step is to clean all rust-affected areas. This can be done using a brush or a special attachment on a drill, or a piece of sandpaper.

Manual curved brush - good for cleaning seams and inside corners

Even the slightest traces of corrosion must be removed so that the metal is absolutely clean. If the paint is swollen in some places, you need to pick it off and clean the affected area. You can use one of the solvents to remove the paint, but it is necessary to clean such places.

Protecting the underbody of the car from corrosion involves thorough cleaning of damaged areas. If you need to clean large areas, you can use drill attachments

The next stage is treating the bottom with degreasing compounds. This is necessary to improve the adhesion of subsequent layers of protection to the metal. The most popular degreaser among motorists is white spirit, but you can use any.

White spirit is sold in containers of various sizes (5 l, 1 l, 0.5 l). Suitable for body degreasing

The quality of degreasing can be checked with filter paper - wipe part of the treated surface. If traces remain, re-processing is required.

After this procedure, a rust converter should be applied. Read the label on how to apply and how long to wait: different formulations are applied differently. Now it's time for the primer. You can apply a mixture of red lead and natural drying oil (2:1), you can use any of the ready-made primers, of which today there is a very large selection with different properties.

A mixture of drying oil and red lead retains its properties for no more than 24 hours, so do not delay processing.

After the primer, mastic is applied, which, in addition to protecting against corrosion, can also act as a noise absorber (bitumen mastics), protection against the ingress of sand and pebbles (liquid plastics).

Applying mastic is an effective step to protect the underbody of the car from corrosion.

These compositions can be applied alternately, but bitumen mastic should go first, since it has poor resistance to mechanical damage, and liquid plastic creates a dense, durable film that can withstand the effects of sand, pebbles, moisture and various active environments. But the mastic, before applying the next layer, must be allowed to dry (at a temperature of +20°C this will take a day, if the temperature is lower, it will take even more time).

Protecting the underbody of a car from corrosion using standing mastic

Instead of anti-corrosion mastic, you can paint the primed bottom in two layers or use asphalt-bitumen varnish. It will take 16-18 hours to dry these materials at +20°C.

In hidden cavities, processing is difficult: access there is only possible through small technological holes. Therefore, manufacturers have developed special liquid formulations for these purposes that can be sprayed using a compressor: liquid oils or formulations based on paraffin and wax.

Protecting a car from corrosion in hard-to-reach places uses special products sprayed into technological holes using a spray bottle.

Oils do not lose their liquid for a long time and when new chips and cracks appear, they simply fill them, preventing oxidation. Compositions based on paraffin and wax retain elasticity for a short time, but the film they form is more durable.

Dinitrol ML (“Dinitrol ML”) - anticorrosive agent for treating closed cavities. Convenient to use for treating doors from the inside

No matter how well the anti-corrosion protection of the bottom is performed, the ubiquitous rust still finds loopholes.

Destruction processes are especially often activated in winter, when the liquid that gets into microcracks, freezing/freezing, expands them, and the reagents that are sprinkled on roads also have a negative effect.

Therefore, the most optimal time to test the effectiveness of anti-corrosion protection for the bottom is spring. If traces of rust are detected, all damaged areas are processed again.

Cathodic protection against car corrosion

One of the easiest and most reliable ways to slow down corrosion is to use an electrochemical method of protection. To do this, the car body becomes the anode, and special plates located in the most vulnerable places become the cathode. With such a potential distribution, the cathode plates are destroyed, while the anode (car body) remains intact.

Electrochemical protection against car corrosion is one of the most effective methods

It’s easy to make such electrochemical corrosion protection yourself. To do this, you need to have basic knowledge of electronics and soldering iron skills. If you don’t have such skills, or don’t want to tinker, you can buy a ready-made device.

Electrochemical protection kit for car corrosion

It is a small electronic unit with indicators and a set of electrodes. Electrodes should be placed in the places most susceptible to corrosion:

in places where headlights and sidelights are mounted,
in front of the bottom,
behind the front wheel guards,
on the inner parts of thresholds and doors,
in the rear wheel arch,
at the junction of the wheel and the wing,
at the rear of the underbody, etc.

Places for installing electrodes for tread protection against corrosion of a car

The number of plates and the size of the plates may vary, but there is a certain pattern: the larger the size of the electrodes, the fewer there are.

Protector plates (from English to protect - to protect, which is why this method is also called “protective protection against car corrosion”) must be installed so that moisture gets on them as intensely as possible, and the outer side (there is no soldering on it) cannot be covered with any electrical insulating material. coating (mastic, varnish, etc.). To attach to the body, you need to use epoxy putty or glue, attach the electrodes to parts that have a paint coating.

The principle of electrochemical protection against corrosion of a car

The electronic unit for cathodic protection against corrosion of the car is installed in the passenger compartment and connected to the electrical network so that even when the engine is turned off, it is powered. Such a device consumes very little energy, and protects the body from corrosion thoroughly and reliably. Moreover (with proper installation of electrodes) even in the most difficult-to-reach places.

There are several other anode options for electrochemical protection of a car against corrosion. You can use a metal garage, a ground loop, or a metalized “tail” for these purposes.

To use a metal garage for cathodic protection, it must be connected with a wire through a resistor to the battery positive. This protection is especially effective in the summer, when condensation often accumulates in a metal garage.

Increased humidity when using cathodic protection against corrosion of a car does not contribute to the destruction of the protective coating, but, on the contrary, slows down the processes of metal oxidation on the body.

In order not to climb under the hood every time, you can take the “plus” from the cigarette lighter (if it has potential in parking mode).

The garage can serve for electrochemical protection against car corrosion

If the garage is non-metallic, you can drive four metal rods at least a meter long at the four corners of the car, connect them with wire, maintaining electrical conductivity, and connect them to the car in the same way as a garage.

Barrier protection of a car against corrosion

Most often, corrosion begins in places where stones hit or frequent contact with water. These places usually have a fairly clear localization, and if they are covered with reliable mechanical barriers, the process of car destruction can be delayed. Special plastic fender liners are installed on the wheel arches, and body kits are installed on the sills and lower parts of the doors. On the leading edge of the hood you can often see plastic spoilers or leatherette trims.

The so-called “liquid fender liners” are popular among car enthusiasts; they perform two tasks at once: sound insulation and corrosion protection.

“Liquid fender liners” DINITRON 479 is a product based on synthetic rubber. Creates a reliable, elastic film on the car body

The video below shows that DINITRON 479 is reliable protection.

In recent years, a fairly popular method has been to cover a car with a protective film, which provides good protection against the effects of water, sand, and small stones from under the wheels. Such protection protects its properties for two to three years, depending on the type of film used. After which it can be easily removed and glued again (if desired). The video below shows how to apply a protective (anti-gravel) film to a car.

Source: https://avtofirst.ru/zashhita-kuzova-avtomobilya-ot-korrozii.html

How to protect your car from corrosion?

Don't let it get to this point!

The problem of corrosion on the car body worries many car owners. This nuisance threatens not only vehicles that are stored on the street, but also those that are in the garage.

This was confirmed by the results of independent studies of more than 100 cars of various brands and models, no earlier than 1998, conducted by the magazine “Vi Bilagare”.

Experts from the Swedish Corrosion Institute confirm that traces of it can be found after 3 years of use on all cars without exception. This means that protecting your car from rust takes almost first place after protection from theft.

To understand how to protect a car from corrosion, you need to understand the reasons for its occurrence.

Corrosion and its causes

The process of turning iron into rust occurs in the presence of two components - oxygen and water. Both substances are present in the atmosphere in excess, and accordingly, it is impossible to completely isolate metal from their effects. Water with elements dissolved in it is called an electrolyte.

The rate of corrosion is influenced by a number of circumstances: impurities of industrial emissions, chlorine ions (salt), etc. Since roads are regularly treated with various salt-based reagents in winter, the issue of anti-corrosion protection is becoming increasingly relevant.

Another reason that accelerates corrosion is increased temperature and humidity. They impose certain restrictions on the functioning of the engine compartment, exhaust system and poorly ventilated hidden cavities. Moreover, different parts of the body are destroyed at different rates, since during operation they are subject to individual loads and conditions.

Welds

The most vulnerable place is the welds. This is explained by the fact that there are always microcracks at the welding site, into which moisture easily penetrates. In winter, it turns into ice, widening the gap and occupying more and more volume. The mechanism of crevice corrosion is enhanced by vibration that occurs while driving.

Internal cavities

As for the design features of the body, filled with many internal cavities, corrosion very often occurs here, which is discovered late. After all, the cavities are not only poorly ventilated, but also hidden from view. In such places, corrosion occurs much faster and, as a rule, unnoticeably.

Bottom

Anticorrosive Boby for the bottom and arches

The bottom surface is no less vulnerable. This is obvious, since the continuous mechanical impact of sand and crushed stone, complete with water and salt that fly from under the wheels, can destroy even the strongest protective coating. To treat the bottom and wheel arches, you can use anti-corrosion protection from Body.

Engine and exhaust system

The operation of the engine and exhaust system also often provokes the occurrence of rust - the functioning of these components is associated with a significant increase in temperature.

That is why different car components require different levels of protection and individual approach.

How to protect your car from corrosion

The choice of anti-corrosion materials is very wide - from the usual bitumen and mastics, which are applied with a brush, to compositions in modern aerosol cans. Until recently, bitumen mastic was considered the best method of protection. However, it retains its original shape rather poorly, which leads to the appearance of microcracks and then rust.

Aerosols are more modern and convenient - they will effectively displace remaining moisture and provide uniform coverage with a protective layer. In addition, you can choose the appropriate anticorrosive composition, depending on the part of the body being treated.

Anticorrosive with rubber filler, characterized by increased frost resistance and plasticity. It is able to reduce vibration of body panels, protect against damage and impacts from stones. Plastic or wax can also be used as a filler.

Specific means:

Anticorrosive Boby - suitable for the bottom and wheel arches. Forms a tough protection.
Anticorrosive Tectyl is a more expensive and softer composition. Preferable if there are already small areas of corrosion.
Movil - the body itself is treated with it (welds, door hinges, the inside of the hood, trunk and doors).

Algorithm of actions

We detect traces of corrosion

First of all, you should thoroughly wash the car, paying special attention to the sills, welds and wheel arches. A prerequisite is to dry all surfaces thoroughly.

Places where the paint has peeled off or traces of corrosion are found must be cleaned using coarse sandpaper, a chisel or a wire brush and degreased with white alcohol, or better yet, use a rust converter (for example, “Tsinkar”).

Only a degreased and clean surface ensures reliable adhesion to anti-corrosion materials. Let's start processing.

As soon as the rust is detected and cleaned, a layer of primer should be applied (if necessary) and treated with an anti-corrosion agent. Prevention must be carried out every 2 years.

Converters are available to treat rusty scratches. They are applied with a brush to the damaged area and within 30 minutes the rust is converted into lead mastic.

Internal surfaces (fenders, lower parts of doors, aprons, wheel arches) should be protected with polymer anticorrosives. In this case, the metal is coated with a thin layer of color that will protect it from moisture and salts. However, to protect any external surface, thin-layer and transparent special preparations are required.

Special shampoos containing anti-corrosion additives will help protect the car body from corrosion. But they are suitable only after the car has already been provided with comprehensive protection.

To treat the bottom, it is better to choose black rubber-containing compounds. To protect welds under the hood, use a multi-component aerosol based on a mixture of wax and resins. (For example, Movil.) It does not spoil the appearance of the engine compartment so much, since it forms a dark yellow film. One cylinder is usually enough for 2-3 times of treatment.

When starting to apply anticorrosive, you should study its description: temperature conditions

during processing, drying time of layers and other features. During the application process, special attention must be paid to suspension components, welds and bolt connections. While the first layer dries, you can begin to paint the engine compartment. Be aware of fasteners, welds and areas around the headlights. But avoid splashing the generator and drive belts. Otherwise, engine cooling will deteriorate due to excessive sliding of parts.

To protect hidden cavities, Movil, which contains all the necessary anti-corrosion additives, is successfully used. It is better to entrust treatment with Movil to service station specialists, since the drug is toxic.

After completely treating the car in three layers, it is recommended to take care of it for 24 hours. Do not overuse driving on gravel, puddles or mud. If all actions are carried out in accordance with technology and compliance with requirements, then you don’t have to worry about the car body in the next two seasons.

Electrochemical protection

In addition to the above, there is electrochemical protection of the car against corrosion - cathodic, based on the application of a cathode current or a cathode electrode. In this case, 2 galvanic elements are under stable voltage.

The cathode (protector) will be protected by an anode (chrome, zinc, aluminum or magnesium) from corrosion. The installation operation takes no more than 30 minutes. As a result, a galvanized effect is created on the entire surface of the car, including hard-to-reach places.

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This will help protect the car from corrosion for up to 10 years.

Regular maintenance is the key to long-term car service

In conclusion, it should be noted that the car requires regular attention and care. It is important to detect corrosion in time and prevent its development in advance. Currently, a wide range of different anti-corrosion materials have been developed that effectively cope with this problem.

Let your favorite car last even longer!

Source: https://krasimtachky.ru/texnologiya-pokraski/kak-zashhitit-mashinu-ot-korrozii.html

Top products for anti-corrosion treatment of car bodies

The durable metal surface of new or old cars is coated with special anti-corrosion agents. This allows, under conditions of constant use, to extend the service life of the car body for a long time.

The production volumes of anti-corrosion coatings continue to grow because all means cannot protect even the highest quality car from the oxidative effects of air, water and time. With a skillful approach and regular care of the condition of the car, when applying an anti-corrosion coating to the car, careful car owners can manage to keep the car untouched by rust for a significant period of time.

The most vulnerable places

Corrosion is the process of destruction of metals. Oxidation occurs due to electrochemical, physicochemical and/or chemical interaction with other substances in the external environment - oxygen and water. The most vulnerable areas of a car to rust are those that are under constant and long-term exposure to external factors.

The open surfaces of the car are subject to mechanical stress and are constantly in contact with atmospheric air containing oxygen. Hard-to-reach areas of the car body cannot always dry quickly after moisture enters, and therefore are also subject to the destructive effects of oxidizing processes.

The most vulnerable places for corrosion in a car are the following:

There are always microcracks in places where car body parts are welded. They are the initial sources of corrosion, especially in the presence of high levels of humidity. In this case, water turns into ice in winter and, increasing in volume, contributes to the appearance of a crack in the seam and its subsequent increase and cracking.

The underbody of the car, the surfaces of the wheel arches, the exhaust pipe, the muffler, the wheel arches, the sills.

The bottom, lower part of the doors and other parts of the car into which crushed stone and other debris flies from the road are constantly exposed to increased exposure to streams of dirt and sand quickly moving from under the wheels, which enhances the corrosive effect. These places primarily need anti-corrosion treatment.

Engine and exhaust system.

In conditions of constant operation of the car engine and the exhaust system, which is closely connected with it, permanent conditions of elevated temperatures and high humidity are created, so corrosion also occurs in this part of the car.

The car interior and internal cavities remain wet and dirty even after several short trips around the city.

It is worth noting that despite similar processes occurring during vehicle operation, vulnerable areas are treated with different solutions. Since the nature and intensity of pollution is heterogeneous, each detail requires an individual approach.

Hidden and hard-to-reach car cavities are treated with liquid oils, wax-containing and paraffin-containing elastic automotive products. Oily car products fill cracks, displace moisture, periodically moving along the surface as the car moves. Substances with a high content of paraffin and wax contain a solvent that gradually evaporates and an inhibitor remaining on the surface, that is, a corrosion retardant.

External surfaces need to be treated with hardening compounds, and internal, hard-to-reach places - on the contrary, with liquid, non-hardening substances.

How to protect your car from corrosion

Anti-corrosion treatment of a machine requires the use of several substances and technologies. During the complete rust treatment procedure, the following types of protection are used:

Protective anti-corrosion substances that actively interact with the surface of the machine and repel moisture, for example, Movil with a corrosion inhibitor.

Refers to mechanical methods of protection. Substances are also used that, after applying a thick layer to the surface of the car, completely isolate the car from corrosion or external influences of sand and gravel. For example, mastics have good protective properties against mechanical damage and corrosion.

Products that transform the surface of a car that has already begun to rust. They cover up rust on the body.

They combine several substances into a single complex.

The first type of anti-corrosion treatment for a car is done with your own hands to prevent corrosion on the bottom of the car. To provide passive protection to the underbody, it is carefully covered with a special material, thus preventing the lower surface from getting destructive fractions from the outside.

Barrier protection and galvanizing method

Anti-corrosion protection of the car body by galvanizing is carried out at the factory.

To protect against corrosion, the machine body is dipped into a special bath of molten zinc, as a result of which a strong ferro-zinc (Fe + Zn) alloy with a layer thickness of 0.8-2 microns is formed on the treated surface.

In this case, the distribution of zinc throughout the metal of the body is as follows: in the depth of the anti-corrosion protection there is about 70% of zinc and only closer to the surface the zinc content increases to almost 100%.

After properly galvanizing, the machine is closed to corrosion barrier and electrochemically. The car body is also protected by attaching shields, hood spoilers made of plastic material or leather, as well as lockers, that is, plastic fender liners, linings, covers for the sills and the lower part of the doors.

Body lamination

Lamination is the covering of a car body with a special polyurethane, vinyl, anti-gravel film using special tools.

This anti-corrosion film not only acts as a barrier to small fractions (pebbles) falling on the car, from scratches, chips and other minor damage, but also prevents sunlight from spoiling the color saturation of your car.

This type of protection of the car body from corrosion does not damage the varnish (paint) and does not enter into a chemical reaction with the paintwork, so it can be easily removed when worn. Properly glued film lasts about five to seven years.

Cathodic protection

The effect of anti-corrosion protection when using cathodic protection devices is compared with galvanizing. The principle of operation is the polarization of the metal during the creation of a galvanic couple: the electrode and the protected surface. During the application of cathodic protection, a negative potential of the desired limit value is produced, which prevents oxidation.

The peculiarity of this method is that it protects the car from corrosion even in hard-to-reach places. Moreover, restoration of car parts already affected by corrosion becomes available. Cathodic anti-corrosion protection is also actively used to protect the trunk of a car from external influences.

How are the external surfaces of the body and muffler treated?

According to the variety of compositions of various means for treating a car body against corrosion with your own hands, you can select the following substances:

Anti-corrosion mastic for cars.

Various tread or protective preparations, which are made on the basis of bitumen, epoxy or synthetic resin, sometimes with the addition of rubber, are applied to almost any part of the body. They have sound insulating properties, dampening resonant vibrations of the body. Mastics are applied mainly in a warm, heated form.

It is used as a protective agent with high permanent elasticity, however, such mastic does not protect against impacts and sudden movements of the machine.

Bitumen mastic or bitumen-rubber.

A preventive agent for treating the car body against corrosion, which contains special inhibitors.

Suitable not only for anti-corrosion treatment of external parts of the car, but also for coating the bottom of the car.

Contains elements of different types of mastic and can withstand air temperatures reduced to -60 C.

Polymer liquid anti-corrosion materials (sometimes phosphate), applied to the surface being treated, consist of substances based on polyvinyl chloride or rubber. This anti-corrosion treatment for cars has good adhesion, that is, excellent and durable adhesion to the surface. Apply on a pre-coated primer.

It is a polymer plastic material that is used to treat the most vulnerable areas for corrosion on a car. These are wheel arches, sills, the edge of the hood; liquid plastics are considered additional protection.

The anti-corrosion agent is designed to protect joints, seams and surfaces of the car body. After application and drying, it forms a waxy protective anti-corrosion layer.

Next you need to figure out how to paint the muffler. Protective body painting will help you in this matter. Such protection against car corrosion prevents rust and aging of the metal material. It is advisable to paint the muffler using heat-resistant paint so that the car can be used in hot and cold weather.

The highest temperature point at which protective paint performs its functions is 400 C. To increase the protective-repellent properties of the coating applied to the muffler, you can also choose paint with the addition of silicone.

Anti-corrosion agents for the muffler and other car parts require drying or heat treatment, that is, measures that increase the tightness and strength of metal parts.

Now you have learned how to protect your car from corrosion. To do this, use special car products and films glued to the body.

Source: https://InfoKuzov.ru/material-instrument/antikorrozijnnie-pokritiya

How to protect a car from corrosion - effective methods

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CONTENT:

How to protect a car from corrosion?

Many people are faced with the problem of corrosion on the car body. Regardless of where your car is located in the garage or on the street, this trouble will definitely overtake it. A car owner will ask himself how to protect a car from corrosion; the answer to this question is very simple. First, you need to find out how it forms on the surface of the body, and then study methods of combating corrosion and choose an effective one.

Corrosion in different areas - we find and localize it!

When choosing the most effective method of corrosion protection, you need to remember that corrosion of a car body can have different specifics. Different parts of the car corrode at different rates because they are in different conditions during operation. The most vulnerable place is the weld seams; it is on them that cracks form, into which moisture can easily enter.

Vibration plays a huge role in the mechanisms of crevice corrosion, as well as temperature changes in winter. The moisture turns into ice and begins to enlarge the crack as it takes up more space in the solid substance. Such a simple process leads to major troubles.

The car body has a large number of internal cavities, they are hidden from the human eye, and they are also poorly ventilated, as a result, excess moisture accumulates there, which turns into water; it is in these places that corrosion does its evil and irreparable deeds.

Another very vulnerable place to corrosion is the surface of the bottom; water, small stones, salt and sand constantly fall into this place from under the wheels. The exhaust pipe and engine can also contribute to corrosion.

Active and passive corrosion control agents

In order to avoid this problem in the modern world, there are many ways to prevent corrosion. Including, there are several ways to help protect your car from atmospheric corrosion and mechanical corrosion.

The first method is called the passive method; it involves isolating the metal from exposure to atmospheric air. The second method is active, it is capable of forming a protective film on the metal, which turns the oxidized layer into soil; this soil does not react with water, salt or acid, thereby protecting the surface from the harmful effects of corrosion. This is an excellent way to combat rust on the body surface.

Various mastics are passive means that protect the underbody. They are created on the basis of rubber, resin or bitumen. They also add various oils, graphite and fibrous substances. This mastic is applied to the very bottom of the body in a thick layer.

Many companies produce such mastics; they can be purchased on the Internet, in car dealerships and at service stations, including gas stations.

Before applying mastic, it is necessary to treat all cracks with an anti-corrosion agent, since this agent is not able to penetrate into them.

Cathodic protection

Cathodic protection

Cathodic protection against corrosion of a car is a special electrochemical protection based on the application of a cathodic electrode or cathodic current. The anode will protect the cathode from corrosion. In this case, the anode is the car body.

More active metals are able to protect the body, these include zinc, chromium, magnesium and aluminum. The metal that acts as a cathode is called a protector.

It is mounted on a clean surface of the body; when moisture gets in, this metal will react and protect the car body from the harmful effects of corrosion.

Priming method

Many owners of foreign cars believe that the factory protection of the car against corrosion will be enough for them. Owners of a galvanized body can generally sleep peacefully, but in reality this is not the case. Many people use the conventional priming method, but this method has long been outdated and is ineffective. The cataphoretic method of applying a primer to the surface of a car is considered the most progressive and effective.

Applications of galvanizing

The most effective way to combat rust at a factory is to galvanize the body. It is made with a thickness of 6-9 microns; after such treatment, corrosion may appear in at least a year.

This is due to the fact that micropores form in the coating, it is through them that moisture enters the metal and reacts with it.

It is worth remembering that if corrosion has appeared on the surface of your body, then you will not be able to eliminate it forever; it will definitely make itself felt at any opportunity. Therefore, from the first days of buying a car, it is worth taking care of its protection.

Electrochemical protection method

Electrochemical protection of a car against corrosion - this protection is a special cathodic protection. It contains two galvanized zinc metals that are under constant voltage, this is what creates the galvanizing effect on the entire surface of your car, thereby helping to reduce the occurrence of corrosion by 500%.

This was proven by scientists who conducted more than one series of simple chemical experiments. They are used on pipelines, metal structures, and, more recently, on car bodies. Currently, it is considered one of the most effective methods that helps protect the car from rust.

It protects your car even in the most difficult to reach places, unlike other anti-corrosion devices and drugs. Electrochemical protection consists of an electrical unit and a zinc plate.

It must be grounded and connected to the battery and the car body. This method helps protect your car even while it is parked outdoors. This method has been used in European countries and the United States of America for a long time.

He came to us quite recently, but has already gained enormous popularity. It is used by many motorists.

Protection of hidden car cavities

Protection of hidden cavities

In order to protect hidden cavities, you need to know several rules. High-quality processing of hidden cavities is one of the key points in car protection. A real specialist who works at a service station can select reliable protection for these places.

In this case, mastic is not the best method of protection. At the moment, there are a lot of chemicals that will protect your car and prevent rust from appearing on the body and more. Modern companies are developing materials that penetrate the surface of the body and create a protective film; cracks should be treated with anti-corrosion coating agents.

Electronic protection method

Electronic protection method

Electronic protection of a car against corrosion can significantly slow down the process of corrosion in 99.7% of cases. This is evidenced by numerous tests that were conducted by scientists. This protection helps protect your car from corrosion for up to ten years. Many companies provide these devices for sale and provide a guarantee on them. They do not create interference while listening to radio stations; they meet all modern requirements and quality standards.

This device is quite easy to install; many people install electronic protection on their own, without the help of specialists. You should make sure that all the wires of the device are in place and do not interfere with the car owner.

Plastic fasteners or insulating tape should be used for wires. You can check the operation of the device by the glowing lights; they should light up when you turn on the engine; if this does not happen, then you should check the operation of the battery. If even after this the light does not light up, then you should contact the dealer from whom you purchased the device.

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Advantages of the electronic method

Electronic protection of your car against corrosion will help you significantly save money and time. After all, the most vulnerable to corrosion are the rear fenders, the body, the bottom, and the inner surface of the transmission. It is in these places that corrosion develops frequently and rapidly, mainly due to poor ventilation and accumulation of moist air.

When installing fender liners, it is worth ensuring freedom of air access to ensure ventilation. The main disadvantage of mastic is that it has to be treated with the car every year, unlike electronic protection. Also, pillars, internal beams, side members, and the ceiling are no less vulnerable. In order to process them, you need to drill special holes, and this is an additional source of penetration of harmful substances into the cavities of the car.

Various corrosion can occur during mechanical damage to the body. Such damage can destroy the structure of the metal, and this is extremely dangerous for the integrity of your car. Many parts will simply have to be replaced, since they cannot be repaired.

Electronic protection of a car against corrosion is practically the only method of protection against rust with internal stresses; it completely eliminates the impact of weather conditions on the metal. This protection is compatible with any mastic and additional anti-corrosion agent. Your body will be under reliable protection.

All of the above proposed protection methods will help protect your vehicle from corrosion, they will be able to eliminate its occurrence. You can treat your car yourself with mastic or primer, as well as anti-corrosion agents.

We also have specialists at your service who will help you install electronic or electrochemical protection at a high professional level. Your car will be in reliable and strong hands of a true master of his craft.

Source: https://pokrasymavto.ru/kak-zashhitit-avtomobil-ot-korrozii/

Protecting your car from corrosion

Car anti-corrosion treatment

Body corrosion is the appearance of rust and the destruction of the metal body of a car under its influence. For the manufacture of automobile bodies, steel is often used, which, under the influence of the environment, begins to oxidize, thereby disrupting the structure of the metal and beginning to collapse. Restoring a rusty body is a very complex and expensive process, so the destructive effects of corrosion should be prevented in advance.

Nowadays, corrosion, although not a pleasant problem, is solvable. To combat it, you need to know which parts of the body are most susceptible to it, and what the mechanism of corrosion occurs, as well as what means should be used to eliminate it.

Average imported cars are designed for 10 years of operation when stored in a garage, and with good quality road surfaces. In the CIS countries, these two points cannot always be observed.

To prevent body rusting, you should know the factors that contribute to it:

Condition of the roads. When driving on a bad road, the body is damaged by small stones, forming microscopic chips, and when driving through potholes, the body begins to vibrate and cracks grow;
Winter period. In winter, roads are treated with salt; upon contact with the body of salt, the aggressive environment begins to destroy any protection of the body coating;
Body quality. The rate of corrosion depends on the presence of special additives in the metal. So, for example, if you take budget cars from twenty years ago, then at present there is not a single one whose body has been preserved today without traces of corrosion, unlike expensive brands of that time, in the production of which the body was made of metal alloyed with special additives ;
Humid climate. In regions where there is high humidity, especially on the coasts near the seas, corrosion occurs much faster, since water particles in contact with metal oxidize it more than air.
Sudden changes in temperature. In winter, when a car is driven from the cold into a warm garage, condensation begins to form on the body, thereby creating conditions for the metal to rust.

The process of treating a car against corrosion

Immediately before treating the car body against corrosion, the rust should first be removed. Rust is removed mechanically, using special devices, such as sandpaper, an angle grinder with an emery wheel, or sandblasting, the latter method is the most effective.

To speed up the rust removal process, you can use special solutions such as hydrochloric acid. The most effective way to combat corrosion is the use of converters or modifiers. When applied to rust, a chemical reaction occurs in which iron oxide (rust) is converted to iron tannate.

To process the body, you do not need to have special skills, just follow the following sequence:

The very first thing you should do is degrease the surface, since if you treat a dirty surface with anti-corrosion substances, then there is simply no point in applying them; alcohol or paint thinner - white spirit - can be excellent for degreasing.
The method in which you treat the body against corrosion depends on the size of the rust. If the rust is not significant, then it is enough to use sandpaper to remove it. If the corrosion has grown deep into the metal and on the sides, then removal will require using a brush with metal teeth or a grinder with an abrasive wheel. For a better effect during removal, it is recommended to use special solutions of orthophosphoric or hydrochloric acid, which, with their aggressive environment, soften the rust, making it easier to remove.

IMPORTANT! After removing rust using solutions, it is imperative to treat the places where the chemicals come into contact with the metal, since the remnants of one or another substance provoke the development of new rust.

In the final process of getting rid of corrosion, the cleaned parts of the body must be primed. The order should be followed: epoxy primer is applied first, and acrylic primer is applied on top of it.

Anti-corrosion agents

Currently, there is a large selection of anti-corrosion agents that can be used to protect the body from rust, each of which has its own advantages and disadvantages. Automotive stores can provide you with the following products:

Paraffin compounds. They have the advantage that they dry immediately after application, forming an elastic protective layer that can retain its properties during temperature changes;
Bitumen mastic. Includes synthetic and bitumen resins that protect the body by preserving the metal;
Oil-based anti-corrosion agents. They are used in a liquid state, due to which they completely fill various cracks with their composition;
Polyvinyl chloride rubber materials. They are mainly used by the manufacturers themselves, as they are reliable and durable;
Liquid plastic. It is used mainly as additional protection, due to its low mechanical stability.

This method is a purely mechanical way to protect the body from rust; there is another method, the so-called passive method of protecting the metal body thanks to its galvanization, which can also be done at home using special tools and equipment. The processing sequence is as follows:

Remove rust with sanding materials as much as possible;
The car is put on the handbrake and the engine is started. The drive included in the special device is connected to the positive terminal of the battery. It is possible to carry out the procedure with the engine turned off, but this is not as effective;
the second end of the wire is connected to the red electrode. To create a galvanic effect, the machine body must be grounded;
at the end of the electrode there is a sponge designed to absorb moisture; it must be dipped in a solution to remove rust, and then thoroughly rub the composition over the affected area;
after removing traces of corrosion, it is necessary to wash off the remaining solution with water;
the next step is to disconnect the red electrode and connect the gray one;
dip the gray electrode sponge into the zinc solution and treat the surface again until there is a sufficient layer of zinc on it.

Practice shows that galvanizing an engine is the most effective method for combating and preventing corrosion.

Engine and exhaust system corrosion protection

Parts inside the car are also vulnerable to corrosion. The fuel combustion and gas exhaust system operates in aggressive conditions. On the one hand, they are exposed to high temperatures, acid vapors and moisture condensation, and on the other, to water, stones, salt and dirt.

Corrosion in places hidden from view occurs due to the formation during combustion of a fuel mixture - water, carbon oxides, nitrogen and sulfur. According to their chemical characteristics, these substances are strong metal oxidizers.

In the muffler itself, with the constant formation of carbon deposits and temperature changes, the metal is especially susceptible to stress and easily corrodes.

To protect the internal parts of the car from rust, the means that are used to protect the body are not suitable, since the temperature of the exhaust gases is usually within 400 degrees, and the temperature of the metal of the exhaust pipe during operation can heat up to 300 degrees. Therefore, to protect against corrosion, you need to use only heat-resistant enamels and varnishes.

REFERENCE! To increase the heat resistance of enamels and varnishes, aluminum powder is added to them.

In addition to withstanding temperature, special substances must also have good adhesion, salt and moisture resistance. Structural elements are painted with protective substances using pneumatic spraying. The surface of the engine during operation can heat up to high temperatures.

The main causes of engine corrosion are: oils, dust and soot, which accumulate on various parts assemblies, creating a durable film. Before anti-corrosion treatment, the engine should be cleaned of dirt and traces of oil. Materials for engine corrosion treatment are based on petroleum products.

They also contain corrosion inhibitors, surfactants, binders and fillers. Part treatment agents have good wetting properties and easily penetrate into tight spaces, saturating them and slowing down the rusting process.

When it comes to treating the underbody of a car, anti-rust substances must primarily be resistant to moisture and high vibration.

Every car owner should know that the risk of corrosion always exists; it is worth saying that when assembling cars on an assembly line, their body already at that stage begins to undergo metal oxidation processes. Therefore, you should always pay due attention to the condition of the body and, if the slightest defects related to corrosion occur, take appropriate measures.

Source: https://rulikoleso.ru/interesnoe-na-jrepair-ru/kuzov/zashchita-avtomobilya-ot-korrozii

Description and types of body corrosion protection

It is known that metal surfaces of vehicles must be coated with anti-corrosion agents. The fact is that even with careful care, the body is constantly influenced by external physical and chemical factors, as a result of which rust forms. Anti-corrosion coating greatly helps to extend the life of the body and the car as a whole.

What is corrosion, why does it form and why is it dangerous?

Corrosion is the destruction of metal due to its chemical reaction with water and oxygen. During movement, the unprotected surface of the body and other parts is constantly exposed to mechanical stress and comes into contact with air, which contains oxygen.

Car body corrosion

Atmospheric precipitation, in turn, contributes to the ingress of moisture onto the metal, and in hard-to-reach places of the car, moisture evaporates for quite a long time. The reaction of iron with water and oxygen leads to the formation of destructive rust.

Rust is one of the most serious “diseases” of the body. Its spread leads to a weakening of the vehicle's power structure and reduces the level of passive safety in a collision.

Why additionally process the body if it is done at the factory?

Many motorists believe that only old cars with impressive mileage are susceptible to corrosion, and new cars do not need additional anti-corrosion treatment. In reality, this is far from the case, since the manufacturer's treatment is rather designed to protect the car from manufacturing defects.

In real conditions, the car is constantly exposed to aggressive factors: high humidity, chemicals on the roads, and even acid rain.

The manufacturer rarely takes into account the influence of such conditions, and the quality of factory processing is not always at an acceptable level.

Anti-corrosion treated bottom

Many cars are galvanized during production, however, this measure is also not a panacea for corrosion. The thickness of the zinc layer is very small, so various mechanical damage and vibration loads easily destroy it.

Types of protection

Many types of anti-corrosion treatment have been developed to protect the car:

Active. It is carried out using products that interact with metal and repel moisture.
Passive. This includes barrier protection, for which various types of coatings or linings are used.
Transformative. Includes products that help get rid of rust that has already appeared on the body.
Complex. It involves the use of several methods at once.

Electrochemical protection is sometimes included in a separate category.

Electrochemical method

A very effective method with which you can achieve the same high result as with galvanizing. The essence of this method lies in the peculiarities of chemical reactions between metal, oxygen and water.

According to the laws of physics and chemistry, it is necessary to create a difference in electrical potentials. An element with a high potential is oxidized, and an element with a low potential is reduced.

Thus, to protect the metal from oxidation, it is given a negative potential. The advantage of this method is the anti-corrosion effect even in hard-to-reach parts of the body.

Cathodic protection

Most often, electrochemical protection is carried out using the cathodic method. In this case, the metal of the body acquires a negative potential and is restored. To shift the potential, it is necessary to ensure the passage of current, which is performed using a special device.

The corresponding electronic module can be purchased or manufactured manually, then installed in the cabin and connected to the on-board network.

Example of cathodic protection connection diagram

The device must be turned off periodically, since a negative effect is observed with a strong potential shift.

As an anode - an element that will have a positive potential and experience oxidation - you can use a metal garage or grounding in an open parking lot. When the car moves, the anode is grounded to the road: to do this, just attach a rubber strip with metal elements to the bumper. When driving, a potential difference is formed between the body and the road.

Anodic protection

When using anodic protection, it is necessary to install copper, aluminum or zinc plates on the body, which will oxidize and “pull” the destruction process onto themselves. As a rule, they are placed on the mounts of headlights, mudguards, and the inner surfaces of thresholds or doors. The disadvantage of this method is the installation of plates, which still cannot cover the entire body.

Anodic protection element

Barrier methods

Often, corrosion forms in specific areas that frequently come into contact with water or experience physical damage. Such places can simply be covered with mechanical barriers, which will significantly slow down the rate of its occurrence.

As a rule, the barriers are:

Special primers and mastics that carefully cover the surface of the body.
Plastic linings. Typically, special fender liners are installed on the wheel arches, the sills and the bottom of the doors are covered with body kits, and there are also plastic elements or leatherette linings on the front and rear edges of the hood.
Lamination. The use of film made from vinyl or polyurethane. The body, covered with film, is reliably protected from stones, various minor damage, exposure to the sun and moisture.

Typically, motorists combine several methods of barrier protection.

Application of anti-corrosion coating

Combined corrosion protection

The combined method involves the use of several methods to combat corrosion. For example, you can use plastic linings and apply moisture-repellent compounds. Other car owners prefer to use cathodic protection and special primers.

Any car is inevitably susceptible to corrosion, and the factory coating is not always a reliable anti-corrosion agent. To extend the service life of the body, it must be comprehensively protected from destruction almost from the very beginning of the vehicle’s operation.

Source: https://TechAutoPort.ru/nesuschaya-sistema/pokrytie-kuzova/zaschita-ot-korrozii.html