What metals stick to a magnet - Metals and their processing

Search magnets for gold and silver: operating principle, review of models and prices

Treasures, treasures, hiding places, jewelry These words reek of adventure, adventurism, and romance.

Who didn't dream of finding treasures as a child?

Some adults have kept their childhood dreams and are making them come true by engaging in treasure hunting.

Like all passionate people, amateur search engines have their own clubs and communities. There they exchange experiences, discuss search devices, and make collective forays.

Modern devices for detecting metals help treasure hunters. One such device is a search magnet. More about it below.

Design and types

A search magnet is capable of finding, capturing and lifting metal objects whose weight is much greater than the device itself by 50-100 times. The device is otherwise called an eternal or powerful magnet.

The working fluid consists of a neodymium magnet (contains Nd-Fe-B) enclosed in a glass-shaped turned steel body.

The body is coated with zinc, and the body is coated with nickel, which allows to be used for searching in water .

The housing protects and shapes the magnetic field in the correct direction. There are:

Single-sided - convenient for searching from a boat, pier, bridge.
Double-sided - have a universal purpose.
Trawls are good for examining the bottom of reservoirs.
Rods – for narrow and hard-to-reach places for conventional magnets.

They also differ in body diameter and magnetic strength .

A special bolt (eye bolt) is screwed into the top or side, intended for a cable or rope.

The second function of the bolt is that it is used to remove an object from a magnet.

To do this, the eye bolt is screwed completely into the body, after which the magnetized object can be removed.

Search magnets are most afraid of high temperatures (above +80); when exposed to strong heat, they lose their functions .

It is easy to work with: having attached it to a rope or cable, it is simply lowered into the desired place.

Objects containing ferromagnetic metals will be attracted to the device. Together with a magnet, they can be removed to the surface.

The fundamental difference is that a metal detector can only indicate the location of an object, while a magnet allows you to immediately “get” it. However, a magnet will not help when searching in the ground . Therefore, these two devices in the seeker’s arsenal are designed to complement each other, but not replace each other.

Other distinctive features:

the magnet retains its functions in an aqueous environment ;
no need to buy batteries or accumulators ;
absence of sound signals that attract attention or “declassify” the seeker;
do not take up much space, easy to take with you;
objects are attracted on their own ;
affordable price;
resistant to damage;
long service life, provided that the operating rules are followed - they lose one percent of their strength in a hundred years .

Where can it be used?

Used to search for objects outside the field of view :

in caves;
mountain failures;
wells;
sewers;
bodies of water;
swamps.

A magnet will be a good help during archaeological excavations and searches for wartime items.

Usually used in tandem with a metal detector. Using a magnet, excess, unnecessary metal is collected, but which will be “distracted” when searching with a metal detector. The metal detector then searches for more valuable alloys such as gold and silver.

Objects that are made of metals that have ferromagnetic properties can be attracted by such a magnet. For example, cast iron or nickel.

Ferromagnetic properties are properties of base metals that allow them to “stick” to magnets with great force.

The burning question is, is it possible to lift objects made of precious metals using a magnet?

It is possible if the composition contains metals that react to magnetic attraction.

There is no special search magnet for gold and silver .

However, it is quite possible to obtain jewelry and coins made of precious alloys with its help, because they also contain other elements that the magnet will attract.

For example: 585 standard gold consists of 58.5 percent of gold. The remaining 41.5 percent comes from other metals, including nickel.

Nickel is easily attracted to a magnet. However, in order for such jewelry to be lifted, there must be a touch to the jewelry find.

It's the same story with silver. If the alloy has ligatures (metals added to jewelry to increase wear resistance), objects or jewelry will be attracted.

Review of popular devices and their prices

China is considered the leader in production . Approximately 130 enterprises in China produce neodymium magnets.

These products are manufactured in Russia

scientific and production company "Supersistema", Moscow;
ZAO NPO REDMAG, Kaluga;
LLC "Plastic" in St. Petersburg;
LLC "Research and Production Company "Magnites and Systems", St. Petersburg;
Nepra company, Moscow region, Zheleznodorozhny;
NPO "ERGA" in Kaluga.

Name	Diameter, mm	Height, mm	Breakout force, kg	price, rub.
Research and production company "Supersystem"
F80 (single sided)	48	10	80-90	690
F150 (single-sided)	68	15	170-190	1190
F600 (single-sided)	130	24	660-690	4290
Double sided F150x2	68	24	170-190 on each side	1940
Double sided F600x2	130	39	660-690 each side	7290
JSC NPO REDMAG
F300	94	28	600	3050
F600	136	25	600	5450
Made in China (according to information from the Polyus-magnet online store)
F300	94	28	300	2750
F400	116	20	400	3200
F600	136	25	600	4900

As in any serious matter, caution is important :

Ask the people you are going on search trips with to see if they have pacemakers . The device can disrupt the normal operation of the pacemaker.
Credit cards with a magnetic stripe, mechanical watches, hearing aids and telephones should be kept away from the magnetic device.

Easy to use and maintain, affordable, these devices can help with:

searching for gold and other precious metals;
when digging non-ferrous metal and ferrous metal.

There are practically no restrictions on the place of application. At the same time, they are durable and do not lose their properties.

If the operating rules are followed, search magnets will help in searches for a long time.

Source: https://rcycle.net/metally/dragotsennye/poiskovye-magnity-na-zoloto-i-serebro

What metals are magnetic?

Only steels have magnetic properties , and not all of them. For example, austenitic stainless steels do not attract magnets because they do not have ferromagnetic properties. However, there are a sufficient number of enthusiasts who believe that magnetic waves are emitted by any metal, and therefore there should be a search magnet for gold and silver, and for some this expression is quite normal for perception and practical use.

ATTENTION! MAGNETS FOR SEARCHING GOLD, COPPER, SILVER DO NOT EXIST!

THEY SIMPLY ARE NOT - ANYWHERE!

In our article we describe the theory of how non-ferrous and precious metals can be detected using magnetic fields. This article is our fantasy, supported by scientific developments of foreign scientists.

See also the article - Extraction of scrap metal from water (about ferrous metal and search magnet).

Device for adjusting the magnetic field from metal objects

Strictly speaking, this is not a magnet, but rather an electromagnet, with the help of which you can initiate and configure any magnetic radiation, even quite weak ones, to be captured by appropriate devices. It is not easy to build such a device, but the authors, citizens of Australia, have no doubt about its effectiveness.

That's why they patented their invention in their patent office. Based on the fact that Australian soil is not much different from domestic soil, we will give a description of the device and operating principle of such a magnet for gold and silver.

Although it is necessary to repeat - in the generally accepted sense, this design has nothing .

The operation of the device is based on the well-known physical fact that when any object that generates magnetic oscillations in an alternating electric field moves, changes occur inside the trapper circuit associated with the movement of atoms around the nucleus.

If the area of electric field generation is sequentially moved along or across the magnetic field from a metal object, changes will occur in this area, the intensity of which determines the degree and strength of the interaction of two fields - magnetic and electric.

The difficulty is that strong magnetic fields are not created by noble metals . It is known, for example, that, according to the principle of decreasing, the electrochemical potentials of non-ferrous metals are located as follows (we consider only the area of interest to us): copper → mercury → silver → palladium → platinum → gold.

Thus, if the expression “is copper attracted to a magnet” may still have some basis, then the phrase “magnet for gold” does not make any sense at all.

It is more correct to talk about an electromagnetic trap, which will record the fact of a coordinated change in electric and magnetic fields in a certain, rather local, metallic volume.

— how copper interacts with a magnet:

Recording of changes that occur in the apparatus under the influence of such fields is captured by the measuring circuit. It is a highly sensitive spring made of rhenium, a rare metal that is absolutely insensitive to temperature changes. The rhenium spring must be adjusted to operate.

The process is to set the conditional zero of the device, for which it is placed as far as possible from all metal objects. In urban areas, such a “search magnet for gold, silver and other precious metals” will not work. However, search engines are much more likely to look for gold, platinum, copper, silver, etc.

in old abandoned rural estates

With any movement of the device, a similar action occurs with the electric field, while the magnetic field remains constant in coordinates. Therefore, the resulting movement of the spring will also be different.

Where it turns out to be most intense, its source is almost certainly located - the magnetic field. Another thing is that this kind of search magnet for non-ferrous metals will not be able to show which metal is hidden under the thickness of wood or earth.

But the device will definitely show that there is metal there.

Any metal can be detected by a magnetic field

The principle of operation of such a pseudo-magnet is similar to the coils of a metal detector, with the only difference being that the “magnet” will be tuned to only 1 metal and this is in theory - but we don’t know how it will behave in practice, BUT, most likely, it’s cheaper, faster and simpler will use an ordinary metal detector to search for non-ferrous metals, since not a single wizard has yet invented a magnet for non-ferrous and precious metals, maybe because there are no wizards!

How to assemble and set up

It will be very difficult to find/buy a rhenium spring, but all other parts of the device are quite accessible for making yourself. The sequence is:

A steel axle is made from a thin-walled steel pipe with a diameter of no more than 16 mm. Its length should not be less than three diameters, otherwise the change in the magnetic field cannot be detected.
A frame is made from thin copper or brass wire. The authors do not describe its dimensions, but, based on the dimensions of the tubular axis, it should be at least 200x200 mm. The frame must be sufficiently rigid.
Three (as many as possible) holes are drilled in the tubular axle at equal distances, in which the wooden axles are placed.
Thin-walled wooden disks are made, the number of which must correspond to the number of holes drilled in the axle. Obviously, discs can also be made of plywood: what matters is the mass of the disc and its absolute immunity to magnetic fields.
The central sectors of each disk are covered with metal foil made of the metal that will be searched. Thus, a search magnet for non-ferrous metals - copper, gold and silver (platinum is searched for much less frequently) should have three sets of replaceable wooden disks.
The frame with disks must be able to move freely along the entire tubular axis with fixation in a certain place. If the fits of the mating parts are made with the required accuracy, then there should be no swaying of the frame when it moves.
To create a magnetic trap, plates from an old transformer are used, which are packed into the frame outline. The distance between adjacent plates should not exceed 1.5 mm in thickness and 56 mm in length. Such plates form the screen of the device that perceives magnetic radiation.
Next, assemble the magnetic coil. You will need a solenoid made of 600 layers of enameled wire, which is connected to an alternating current voltage source. The winding should be multilayer, this will reduce the parasitic capacitance of the coil and make the device less inertial.
A ferromagnetic or - which is better - a ferroelectric core is inserted inside the coil.
By connecting this structure through a step-down transformer, a constant position of the frame with the plates is achieved relative to the wooden disks. This will be the conditional zero of the search “magnet” for non-ferrous metals.

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The easiest way to check whether a search “magnet” attracts gold and silver is on a real object made of these metals. At the same time, it will be possible to establish the practical sensitivity of the device.

about how a search magnet does NOT magnetize gold, silver and other coins

Source: https://respect-kovka.com/kakie-metally-magnityatsya/

What metals are not magnetic to a magnet list

Any child knows that metals are attracted to magnets. After all, they have more than once hung magnets on the metal door of the refrigerator or letters with magnets on a special board. However, if you put a spoon against a magnet, there will be no attraction. But the spoon is also metal, so why does this happen? So, let's find out which metals are not magnetic.

Scientific point of view

To determine which metals are not magnetic, you need to find out how all metals in general can relate to magnets and a magnetic field. With respect to the applied magnetic field, all substances are divided into diamagnetic, paramagnetic and ferromagnetic.

Each atom consists of a positively charged nucleus and negatively charged electrons. They move continuously, which creates a magnetic field. The magnetic fields of electrons in one atom can enhance or cancel each other, depending on the direction of their movement. Moreover, the following can be compensated:

Magnetic moments caused by the movement of electrons relative to the nucleus are orbital.
Magnetic moments caused by the rotation of electrons around their axis are spin moments.

If all magnetic moments are equal to zero, the substance is classified as diamagnetic. If only spin moments are compensated - to paramagnets. If the fields are not compensated, use ferromagnets.

Paramagnets and ferromagnets

Let's consider the option when each atom of a substance has its own magnetic field. These fields are multidirectional and compensate each other. If you place a magnet next to such a substance, the fields will be oriented in one direction. The substance will have a magnetic field, a positive and a negative pole.

Then the substance will be attracted to the magnet and can itself become magnetized, that is, it will attract other metal objects. For example, you can magnetize steel clips at home. Each one will have a negative and a positive pole, and you can even hang a whole chain of paper clips on a magnet.

Such substances are called paramagnetic.

Source: https://moreremonta.info/strojka/kakie-metally-ne-magnitjatsja-k-magnitu-spisok/

Search magnet for gold and silver and its properties

Typically, powerful magnets are designed to find precious metals. A search magnet reacts to gold and silver quite strongly, and although it is difficult to find them in their pure form, its power is enough to pick up jewelry and coins from the ground. The main goal of all search engines is treasures, expensive coins, and sometimes just ferrous metal.

The article will describe the structure of the magnet and the basic principle of operation. He will also figure out what exactly can be found with its help and how to find expensive alloys. It will be explained in detail what ferromagnets, paramagnets and diamagnetic materials are. In addition, valuable tips and recommendations will be given that will greatly simplify the search for valuable items.

Search magnet device

This device consists of a steel case, inside of which there is a neodymium magnet. It is made from a rare alloy containing neodymium, iron and boron. This compound has a powerful attractive property. Despite its compactness, it is capable of holding things tens of times its own weight.

To make it easier to get various things, the case is equipped with a special mount. It is screwed into the magnet body via a thread. On top of the fastener there is a fastener in the form of a hook or loop that will hold the cable or rope. This mount has a rigid base that is firmly screwed into the body. The entire structure has a reliable foundation, and in this case, there is no fear in lifting any expensive and heavy thing.

Principle of operation

The search magnet has rather poor functionality. The main task of such an object is to attract as many metal objects as possible. But the device copes with its main task more than well. Thanks to its unique design, it has great strength and is able to hold quite large objects, as well as objects containing gold or silver, which ordinary magnets cannot handle.

This is especially convenient when getting things out of wells, funnels and various pits. It's also good to use this thing underwater. In water, all objects are subject to great resistance, and picking up any object becomes a rather labor-intensive task. But with a neodymium magnet, searching and removing such objects is greatly simplified.

What items can be found

When asked what kinds of things can be found using a search magnet, iron objects, including coins, immediately come to mind. Almost all paramagnetic metals can be found. Simply put, materials that are attracted to the magnet body, but more on that later. Such coins, or precious metals, can be of great value. For example, you can find iron coins from the period of Tsarist Russia, as well as many rare Soviet coins.

Powerful magnets can attract metals such as:

aluminum
copper
tin
brass
lead

Most searches are carried out in attics, in various beaches and public places where people can lose things, as well as in wells and pits. In such places they usually find costume jewelry, expensive jewelry, various metal boxes, and sometimes even expensive mobile devices (on the beach). This is what finding things on land is all about.

As for water, you can also find many valuable things, including gold jewelry. Also, thanks to superstitions, a whole fortune of coins can be raised from the bottom. Moreover, there is no need to get coins from city fountains, since there are quite a lot of abandoned wells that no one needs, but they store precious things.

Does a magnet attract gold and silver?

Is it possible to find pure gold or silver with powerful magnets? No, since such metals are diamagnetic, that is, they are not attracted to magnets. But it's not all bad, thanks to all the power of neodymium alloy, it is possible to get some jewelry. Such objects usually have a ligature in them.

This alloy helps precious metals such as gold or silver acquire certain properties. For example, silver jewelry does not darken as much, but gold jewelry is more durable. But the most important thing is that the ligature allows magnetization and makes it possible to find various alloys.

But it is also possible to find pure gold or silver. At the beginning of the article it was said that iron boxes can be found. Typically, jewelry made of gold or silver is stored in such cases. So, walking through an attic or similar places, you can get rich, in the literal sense of the word.

Magnetic properties of various metals

In order to go hunting for valuable metals, you need to know what exactly will be attracted to a magnet. Since metals have different magnetic properties, and some do not have them at all. They can be divided into three groups:

ferromagnets
paramagnets
diamagnetic materials

Ferromagnets are metals with some of the best magnetic properties. Such metals are highly magnetic. These include ferrous metal.

Paramagnetic materials have the usual properties; they are readily attracted to a magnet, but do not have the function of magnetization. These include some alloys of jewelry and several types of non-ferrous metals.

And finally, diamagnetic materials. Such alloys are extremely difficult to respond to magnetic fields and greatly complicate the search for truly precious things. Diamagnets include gold, silver, aluminum, patina and other metals that even the strongest magnet does not pick up.

Is it possible to find gold with a magnet?

As already discussed earlier, jewelry and coins with gold can be lifted, but it is very problematic.

It is impossible to get pure gold with a magnet.

But if various factors are favorable, such as an iron box or paramagnetic jewelry lying nearby, then there is a chance to find it. Basically, only jewelry containing gold, such as bracelets, earrings and rings, can be caught with a magnet. The best places to search are sandy beaches, wells, and the sea or river bottom where a large number of people swim.

Source: http://lombardyinfo.ru/stati/poiskovyj-magnit.html

Types and uses of search magnets for gold and silver – Glitter Gem

Many companies offer to buy a search magnet for gold and silver. Every person at least once in his life dreamed of finding a treasure. We need to figure out whether it is possible to attract precious metals to a regular magnet?

Magnetic field and metals that conduct it

At the macroscopic level, under the influence of a magnetic field, some substances can be attracted. This also applies to metals and alloys. When hanging a new magnet on the refrigerator, many people don’t even think about why it doesn’t fall off.

The most attracted metal is iron, which is used in alloy with other metals in the production of refrigerators. Now try attaching a gold ring or chain to this magnet. In this case, the gold product will not hold up.

If you perform this trick with a silver item, you will get a similar result. Gold reacts worse to a search magnet than silver, since the latter contains more impurities.

The things that we used to call gold and silver are not actually made of mono-metal, they are alloys. They could “stick” to the magnet if it were larger, more powerful, if the alloy contained a pronounced metal that could be quickly attracted. To do this, consider the types of interaction of substances with a magnetic field.

Here are the main ones:

Ferromagnets – strongly attracted (for example, iron, steel, nickel);
Paramagnetic materials are weakly attracted (for example, platinum, aluminum, magnesium, oxygen). This effect can only be detected using special equipment.
Diamagnets - magnetized against the direction of the external magnetic field and repelled by the magnet (for example, plastics, gold, silver, copper, water, carbon).

Having bought an ordinary magnet, you will only attract ferromagnets; in this case, you will have to forget about a treasure of gold. If you are determined to look only for products made of gold and silver, it is better for you to purchase a metal detector.

It works on a different principle: it does not attract metals, but makes sounds when searching for them. Then all you have to do is dig in the right place.

Decide what to buy so as not to throw money away and not be disappointed with the purchase.

Search magnets

To lift ferromagnetic metals and alloys from the bottom of rivers, ponds and wells, magnets F 200 – F 400 are used (depending on the difficulty of access and the size of the load).

Even if they are the same size, the tearing force can be different, it depends on the content of neodymium (a chemical element). The more neodymium, the more powerful the magnet. For one person, a model with a diameter of up to 1 m and a lifting force of up to 300 kg will be optimal.

It is important to know that flat objects attract better than round ones.

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Safety precautions or what to be careful with

When using a magnet, you must adhere to certain rules:

Neodymium should not be heated above 80°C.
The magnet affects the magnetic fields of electrical devices, pacemakers, watches, credit cards.
The large device is stored and transported in a non-magnetic, for example, plastic container.
You cannot stand between a large magnet and an iron barrel/door, etc., it will be attracted, and a fracture of an arm/leg or other part of the body may occur.
Wipe the device after each use, clean it from dirt, do not leave it without a case, and it will serve you for many years, since the device does not break down and does not require repair!

Have an easy search, precious finds and more gold!

Source: https://kabirski-store.ru/osobennosti/vidy-i-primenenie-poiskovogo-magnita-dlya-zolota-i-serebra.html

What metals does a neodymium magnet attract?

ATTENTION! MAGNETS FOR SEARCHING GOLD, COPPER, SILVER DO NOT EXIST!

THEY SIMPLY ARE NOT - ANYWHERE!

See also the article - Extraction of scrap metal from water (about ferrous metal and search magnet).

Search magnet for gold and silver: what is it, does it exist, what metals does it attract, operating principle and assembly

We are glad to welcome you to our website, dear guests. Today we will talk about whether there is a search magnet for gold and silver, the principle of operation of the magnet, useful properties and methods of application. We will review the models and suggest a way to build such a device yourself. Stay, it will be interesting.

Differences from a metal detector

The operating principle of a metal detector is also based on electromagnetic radiation, however, this device does not attract metals to itself, but captures echoes of the “response” of substances to the field it emits. If there is metal in the ground or water, the device gives a signal. Further work on retrieving objects falls on the person.

The magnet does not provide any information, but simply “attracts” to itself those objects that it is capable of influencing.

Where can it be used

There are areas where you cannot do without a device:

deep wells;
rock crevices;
the bottom of reservoirs, including at great depths.

The device allows you to explore such places and remove objects located there without additional effort.

Can you attract silver and gold?

Precious metals are diamagnetic, so they cannot be extracted using a magnet. An exception may be objects that contain parts made of ferromagnetic metals, and such a part must be voluminous enough to be attracted.

You should not rely on the device to magnetize precious alloys. As a rule, the proportion of ferromagnets in the composition of the alloy is extremely small.

If you want to search only for precious metals, you are better off purchasing a metal detector.

What metals still attracts

The most famous ferromagnets:

among metals - iron, cobalt, nickel, chromium;
their alloys, such as cast iron and stainless steel.

Rare earth metals (lanthanides) are attracted to the device. Manganese, sulfides, selenides and tellurides have ferromagnetic properties.

Advantages and disadvantages

The indisputable advantage of a magnet is its ease of use:

it does not require special storage conditions; you should, perhaps, avoid heating it above 80 degrees;
does not need recharging;
has a very simple design;
takes up little space.

The disadvantage is that it cannot be used to extract gold, silver, and their alloys, including nuggets.

Another thing is metal detectors. The advantage of modern metal detectors is their ability not only to find, but also to distinguish which metal is within its coverage area. How does this feature work? This was made possible thanks to the use of a computer in the design of the device, which analyzes all incoming signals, reacting to the smallest changes.

Is it possible to make money searching for gold and silver with a magnet?

It is impossible to effectively search for precious metals using only a magnet. However, you can use it as an additional device, along with other equipment.

Using it, you can clear the surface of the search site from metal debris, which usually makes it very difficult to detect silver and gold with a metal detector.

Tips for choosing

In addition to their shape, the devices also differ in the strength of the radiation and the method of attaching the cable.

Experienced treasure hunters are advised to choose powerful double-sided magnets, since they are universal and easy to use, although they are more expensive.

Weight and ammunition

Any tool is most effective if it is selected in accordance with the task at hand. The choice of magnet is no exception. To begin with, you should decide what items it will be used to search for, and based on this, select the appropriate device.

It should be taken into account that the higher the power of the magnet, the greater its mass and cost. The optimal option is 400 kilograms. This is not the weight of the magnet, but the weight it can lift!

In addition to the magnet itself, you will need a cable with which the search device can be lowered to the bottom of the reservoir. It is better to choose ammunition with a large margin of safety, exceeding the power of the magnet itself, in order to avoid ruptures and loss of the device. Finding him later is almost impossible.

How to assemble and set up a magnet with your own hands

Making a magnet at home is not an easy task if you don't have neodymium supplies on hand. But building an electromagnet using not a rare ferromagnet, but an electric field, is quite simple.

Required Components

To build an electromagnet you will need:

iron for the core (nail, lock shackle);
copper insulated wire;
source of electric current (battery, accumulator);
connecting wire;
soldering iron

Assembly sequence

Copper wire is wound tightly, neatly, in one direction, onto the core. If a regular AA battery is used as the power source, you can connect it directly to the ends of the winding. For power supplies and batteries, it is necessary to solder the connecting wires (twisting and insulation are also allowed).

See the assembly visually in the video:

How to use it correctly

To search for valuables, it is better to use industrially made magnets. When purchasing a device, it is better to choose units with an eye bolt, which makes it much easier to separate the magnet from the object.

Safety precautions and what to be careful with

It should be remembered that the magnet affects all objects nearby, including pacemakers.

For a person who has such a stimulator, the magnet is dangerous, as it can cause malfunctions in the operation of the medical device.

Mobile devices and bank cards should also be protected from electromagnetic influence to avoid their failure.

How to distinguish a counterfeit coin from an original using a search magnet

If a coin is stuck to the device, you can be sure that it does not contain either gold or silver. A precious coin or jewelry will remain in its place when exposed to the device.

Tips for caring for your device

If work was carried out in water, after use the device must be thoroughly wiped from moisture and dried to avoid rust.

Protect the device from strong shocks, since neodymium cores are quite fragile, and if a crack or chip occurs, they lose power.

Reviews

Egor: “The magnet is great for removing small metal debris from soil dumps when working at a mine. I recommend".

Andrey: “It’s a great thing to get change out of fountains, especially in Europe.”

Victor: “Such a thing is of little use when searching for gold and silver, but for diggers who hunt in battlefields and look for artifacts of the Great Patriotic War, it is an irreplaceable thing.”

Conclusion

I hope this material has helped you clarify the question of what is the use of a magnet and whether it is worth acquiring such a device to search for valuable items.

Don't forget to comment on what you read and share articles on social networks. And we take our leave, all the best.

Source: https://zhazhdazolota.ru/dobycha/poiskovyj-magnit-na-zoloto-i-serebro

What can you find with a search magnet? Cop Secrets

First of all, these will be objects made of iron and cast iron. The water hides many historical monuments in its depths. Most often, weapons are raised from the bottom of reservoirs. Using a search magnet, you can easily pull out hidden treasures in wells and garbage pits, if they were placed in a metal box for better preservation.

Search magnets have proven themselves best in searching for items and artifacts from the First and Second World Wars. With the help of neodymium search magnets, Cossack sabers were repeatedly pulled out from the Dnieper, and many artifacts were recovered from Lake Ladoga. Absolutely all products made of iron or containing ferromagnetic metals are attracted by a neodymium magnet.

Search magnet design

The design of the search magnet is very simple and practical. In the middle there is a very brittle alloy of rare earth metals, boron and iron, which is enclosed in a stainless steel or aluminum housing, or perhaps simply a nickel coating of the magnet.

All free space is filled with epoxy resin, which is why it is not recommended to heat it above 60 degrees. A repair bolt is screwed into the magnet from above or on the side to attach a rope or cable. When attaching the repair bolt vertically, it is easier to tear the magnet off the surface.

Simply screw in this bolt using a lever, and the pin itself will tear the magnet off the surface.

Attention! When heated above 80 degrees, a neodymium magnet loses its properties.

Gold

First of all, all search engines are interested in gold. I’ll say right away: pure gold is not magnetic to a search magnet ! However, most jewelry has a ligature added to it. Alloys are metals that are added to gold to increase strength and resistance to mechanical and temperature influences.

For example, in the well-known 585 standard gold there is only 58.5% pure gold, and the rest - 41.5% - are other metals, one of which is nickel. It is precisely due to the nickel content that jewelry “clings” to a magnet. But you shouldn’t hope too much for this, since the nickel content is very small and jewelry is not strongly attracted to a neodymium magnet. To do this, you need to touch the magnetic surface directly to the jewelry.

Silver

The second important search metal is silver. Silver also has two varieties: which is magnetic and which is not magnetic))

It is worth noting that some antique silver services and sets of cutlery were sometimes made from silver, which is taken with a magnet (with the addition of a ligature).

Stainless steel

Stainless steel, depending on its alloys and impurities, is magnetic to varying degrees. There are only a few of its species that have very little contact. The rest of the part sticks quite well for the reason that it contains from 12 to 20% chromium. Not magnetic at all:

● Aluminum ● Brass and bronze ● Tin ● Lead

● Copper

Important! Neodymium search magnets are very resistant to corrosion. Particular attention should be paid to the protective coating. If the coating is damaged, it should be immediately restored using epoxy resin or paint. If a magnet begins to oxidize, its characteristics can drop by more than 10 times, that is, from 600 kg to 50!

We figured out what metals are attracted by a search magnet. However, we should not forget that during the Second World War, German soldiers always carried a sealed metal cylinder with them in which they kept their most valuable things. It is these cylinders that can be found with a search magnet.

Search magnets are divided into three groups according to their capabilities:

1. One-sided. Perfect for vertical search (from piers, bridges and boats).

THIS IS INTERESTING: How to make neodymium magnets

2. Double-sided. Universal search magnets. Great for almost any conditions. The fact is that when moving a magnet along a silted bottom, a one-sided magnet with an unknown side goes along the bottom, but a double-sided one will capture objects from both the upper and lower planes.

3. Trawl magnets.
They are most suitable for guiding along the bottom. But you should take into account the fact that a magnet weighing over 1.5 kg will be difficult to carry around on an inflatable rubber boat using oars. Important! With strong impacts and slight deformations, magnets lose their properties. When identical magnets are connected, their attractive power does not double, as we would like, but only increases by 30%.

Advantages and Disadvantages of Very Powerful Search Magnets

Powerful (especially double-sided) magnets for searching, as is already clear from the above material, are much more interesting for searching. Their main advantage is power. Getting a more valuable find (especially if we talk about precious metals that are magnetic) with its help is much higher.

However, powerful magnets have their drawbacks :

1. A very powerful magnet (500 kg or more) will be difficult to throw over a long distance, since it weighs more than 4 kilograms.

2. The breaking load with high-quality engagement is much greater than the physical capabilities of a person.

3. The quality of the rope must be high and have a 2-fold safety margin. This is necessary in order to be able to pull out a snagged search magnet from a flooded tree or crevice.

4. Carrying a heavy object for a long time is very tiring.

According to the type of fastening, repair bolts are divided into two types: with vertical fastening and lateral fastening.
For moderate results, a double-sided magnet with an attractive force of 140-200 kg and a lateral fastening of a repair bolt is sufficient. It is quite possible to carry such a magnet all day, although it is possible that the next day you will feel a slight pain in your muscles (without special preparation).

Using search magnets when searching with a metal detector

Many people use metal detectors, but less than half use a pinpointer. Everyone is familiar with the situation when there is a clear signal from the excavated soil, but the target is not visible. You can even move a pinpointer along the ground, hear the target, and find nothing. A neodymium magnet for searching is a great help here: if the target is magnetic, it will instantly stick to the surface. For such cases, using a magnet of 40-80 kg is sufficient.

Attention! It is very convenient to use a fabric bag. Metal debris, of which there is a lot in the ground, does not stick to the magnet. The fabric will also save you from mechanical damage and eliminate the possibility of dangerous corrosion.

Clear advantages of neodymium magnets compared to a pinpointer:

1. Their batteries don’t run out, and you don’t forget to turn them off all the time 2. Quiet (in cases where you don’t want to advertise your presence) 3. Small dimensions. Convenient transportation. You can simply carry it in your pocket. 4. The target itself clings to the surface. 5. Price. You can buy 5 magnets for the price of one pinpointer. 6. Resistance to mechanical damage and moisture.

7. Long service life if basic rules are observed.

Important! Neodymium search magnets lose magnetization approximately 0.1% to 2% per 10 years! Then it’s up to you to decide which search magnet to choose; we can only recommend a proven brand that does not deceive with the declared power - “World of Magnets” (see the brand in the description of the magnet).

Search for valuable coins

The list of coins that can be found using a search magnet is quite impressive. Cheap royal change is not accepted for magnetism, but medium denomination coins were made with the addition of nickel and chromium, which immediately indicates the magnetic properties of these coins. The most expensive large denomination coins, made of gold and silver, cannot be lifted using a search magnet; they interact with the magnet, but very, very weakly.

Purchasing a neodymium magnet is a good investment

The main problem with search magnets is the price, which has skyrocketed since 2009: 95% of rare earth metals are extracted and processed in the Middle Kingdom, and they are used for automotive production. This country has introduced additional duties on the export of magnets from its territory. Throughout 2011, neodymium increased in price 5 times! Neodymium on exchanges has risen in price by no less than 50% in just 2017!

Source: https://md-arena.com/chto-mozhno-najti-poiskovym-magnitom-sekrety-kopa/

Neodymium magnet: what does it mean and what is it made of, how to use

Using a magnetized screwdriver or screwdriver is like having an extra hand.

Inventors shop at a budget Chinese online store.

Driving screws is a task that sometimes requires a third hand. You need one hand to hold the screw, one to turn the screwdriver or operate the drill, and the third to align the objects being fastened. Nobody has three hands, but if your screwdriver can hold a screw, you can easily do most jobs with the two you have. This is one of the reasons why professional tradesmen use magnetized screwdrivers and bits.

A magnetized screwdriver also serves other purposes. This eliminates the need to hold the screw when you have to drive it into a place that is too tight for your other hand. It can also hold screws you remove from hard-to-reach places so they don't fall off or get lost. Moreover, if a screw or any other metal object falls, you can use it to retrieve it.

The main reasons for metal magnetization

Magnets are media that create their own magnetic field. Main groups of magnets:

paramagnetic materials;
ferromagnets;
Diamagnets.

Steel products based on alloys of iron, cobalt or nickel refer to substances whose own magnetic field is higher than the external one, i.e. to ferromagnets. The magnetization of a substance is considered to be the sum of the magnetic properties of particles per unit volume.

At the moment the Curie temperature threshold is reached, spontaneous domains with magnetization are formed, which spread until they are completely filled. Under normal conditions, it is possible to obtain a magnetized tool when working close to electric motors, magnetrons and other elements. The metal takes away the properties of magnetism from a nearby emitter, thereby becoming magnetized.

Working with small parts with a magnetized tool can cause a lot of trouble. Sharpening metals with increased magnetism properties is impossible to ideal sizes, because... the material is covered with shavings.

Advantages

The most common neodymium magnet is one that has an iron oxide alloy, which has good heat resistance, high magnetic permeability and low cost. Equipped with color coding, high coercivity, powerful magnetic field to hold objects suspended, compact size, light weight, affordable and wide range of applications. Has a long service life.

If an ordinary magnet works for 10 years and can be demagnetized, then a neodymium magnet does not lose its properties after 100 years. Another advantage is the shape. This product has a horseshoe shape. It gives the device a long service life. As for the cost, these are expensive products, but the cost is justified by excellent performance and impeccable reliability.

Durability of work as one of the advantages

Force

It is worth pointing out that the strength contained in neodymium magnets is another advantage. She is tall and it is impossible to find a competitor to her. This is a record type of indicator, the increase of which is impossible. Power is generated during manufacturing. Magnetization occurs after the alloy is formed. Thanks to existing technologies, the alloy is magnetized in such a way that the magnet has incredibly high power and this figure reaches a record.

Note! Power is a relative philistine concept. The force is stable, but it is measured using instruments. In this case, the readings depend on the thickness of the surface and cleanliness. The separation angle can have some influence.

Strength as one of the advantages

Life time

The service life of the equipment, if used properly, is 30 years. Due to careless handling, the device may be damaged. The point is the lack of flexibility, as well as brittleness and cracking under heavy load. Falls, impacts, or reduced traction will reduce the life of the equipment. For this reason, it is necessary to avoid falls using parts that come into contact during movements.

Another extremely important point is the irreversible loss of magnetic properties due to heating. Therefore, grinding with cutting or drilling reduces the chain force and may ignite the alloy. If storage and operation are organized correctly, then magnetization is maintained for 10 years.

Long service life

Using a demagnetization device

The demagnetization device comes in three variations. The basic elements can be selected at home, using simple methods that do not require much effort to manufacture. There are special devices that can both demagnetize and magnetize an element.

Magnetometers are used in the following sequence:

The magnetic field strength of the instrument is an important parameter that needs to be determined, because it is possible to get a negative result;
the same parameter must be found on a magnet of the opposite sign;
touching the tool to the area of the device will demagnetize it.

The process takes place within 10 seconds; at home, no connection to the electrical network is required. The functionality is checked as follows: the self-tapping screw is brought to the magnetized metal, and the level of magnetization is checked. Afterwards the demagnetization process occurs and is checked again.

How to use

Neodymium magnetic element is the strongest, exceeding analogues that are based on rare earth metal. In addition, neodymium is capable of maintaining a magnetized structure for a significantly long time. Such equipment can be used in various fields. For example, it is used in the manufacture of over-ear headphones with wind generators, motor wheels and scooters.

Note! Magnets are actively used in industrial, household, and medical fields. They are also used to carry out search work with a metal detector. They can often be found in plumbing fixtures or souvenirs.

Specific examples include the use of magnets in the development of medical devices, magnetic treatment of water, the creation of oil and technological filters, and the formation of actuators with highly sensitive sensors. In addition, they are needed to produce clothes with covers and shoes, and to create advertising, information and navigation materials.

Scope of application of the material

Overall, neodymium is the most powerful permanent magnetic material that has high resistance to demagnetization, attractive power, and a metallic appearance. It has a long service life and consists of boron, iron and a metal of the lanthanide group.

Methods for demagnetizing metal

There are several ways to demagnetize metal structures. Devices are used depending on the frequency of use, purpose and power. Before you demagnetize metal at home, you need to understand the existing structures.

An ordinary magnet is large in size; a tool is held over it at a minimum distance, on the verge of the attraction process. The magnet can be removed from an old speaker, most of which are round in shape. The process is carried out when the product is removed from the structure, loosening it; the further the tool is from the structure, the smaller the amplitude. The location of the axis on which there is no magnetic field depends on the design of the product.
More frequent use will require a device operated at home from the mains. It is possible to make the device at home or purchase it at radio parts stores. The main component is a coil of wound wire connected to a transformer. The supply of alternating current allows you to demagnetize the element, direct current - vice versa.

Removing magnetization with a magnetometer

There are many variations and kits for demagnetizing metals in production.

Tunnel devices include a coil having an opening connected to a network.

The size of the hole can be different, depending on the purpose and dimensions of the parts being processed. Multi-band magnets driven by motion, rotation of which occurs with speed control, the impact and change in amplitude is carried out by moving the part away from the body.

Electromagnets operate from a 220 or 380 volt network and allow you to demagnetize an element with a tap for a certain time. Container mechanisms allow you to install the product to a device in which the necessary environment is automatically created.