How to demagnetize metal at home: methods, devices

Man has been using magnets in various areas of his life for a long time. Often we do not notice their presence in the devices around us and the additional convenience of their use. Today, the vast majority of household appliances and appliances are created using magnets.

However, many unexpected problems arise in everyday life, especially of a technical nature. It happens that you need to maintain or strengthen the effect of a particular magnet, and especially vice versa - demagnetize it. Let's focus on the last problem - how to demagnetize?

After reading a selection of our practical tips, you will find out how, in what way, and whether it is possible to demagnetize “home” magnets without outside help.

How to demagnetize an electricity meter after a magnet

In order to avoid a fine, you must make sure that the water meter is demagnetized.

There are 2 methods of demagnetization:

Using a powerful electromagnet. Bring the device to the meter and turn it in different directions. Make sure that after removing the device the plastic blades work properly and do not stop.
Using a magnet to remove residual magnetism. Attach the magnet to the drill bit, and then spin the device next to the meter. Rotational movements should neutralize accumulated magnetism.

Replace the meter and that's it. Just throw out the faulty one. It will be cheaper than the amount of the fine issued. And for the future, don’t use neodymium magnets to stop the counter, just a small magnet from a small speaker? And anyway, stealing (even from thieves) is bad.
Why does he stop?
There are gears in the drum of the counting mechanism; the magnet causes them to warp and jam. To remove their stopper, try knocking on the body (just not hard), move the magnet in circles, maybe you will find the right point where you will release it. Do all actions with the water turned off, so that they don’t bite under load.
Rather, it was not magnetized, but rather the impeller was clogged with rust and other components of clean drinking water.
Give the water the opposite way, it might get dirty
You can try a demagnetization loop.

I took the kinescope demagnetization loop: I folded it once: And I folded it twice: As a result, we get a demagnetizer coil that is already ready for use.

But due to the small working area and strong heating, I connected another loop in series: In order not to burn the coil or forget to turn it off, we connect the whole thing through a push-button and a fuse: Such a coil is good for demagnetizing a large tool, but use it for demagnetizing drills and taps will be inconvenient, so I made the second option - small and neat. In this version, I used a solenoid from a reel-to-reel tape recorder connected through a transformer.

If an inspector knocks on the attacker’s door, the attacker simply removes the magnet. What are the consequences of installing a magnet on a water or electricity meter in 2022? Additionally, utility employees will recalculate the amount of water or electricity used based on average indicators.

We invite you to read: How electricity charges are calculated

The punishment in this case is fair - you will need to contribute money to account for what the electricity suppliers did not receive.

Homemade demagnetizer or how to demagnetize a tool
What to do if the water meter breaks due to neodymium magnets?
How to remove magnetization from a meter
Magnet for water meter
How to remove residual magnetization from an electric or gas meter?

How to remove residual magnetization from an electric or gas meter?

How to remove magnetization from a water meter
Payment for water Illegal use of magnets for meters is punishable!

CYBERNET Forum
How to demagnetize an electric meter after a magnet
How to remove magnetization from a water meter Illegal use of magnets for meters is punishable! Anti-magnetic control seals on the protection of water and electricity meters!

Vladimirs Vorohobovs Buy a neodymium magnet for a water meter in Ukraine How to remove magnetization from the meter? Select your region

CYBERNET Forum walentin wrote: QUESTION. Can I prove to them that there was no magnet through the court or can they prove with their Expertise that there was a magnet. Or it’s cheaper to pay 3000 UAH. LEO counter type Nik 2102 Well, there was a magnet.

Vladimirs Vorohobovs

Many irresponsible residents take advantage of this. installing magnets near their meters and thus stealing water.. However, now there is an inexpensive seal that can be put on an already installed water or gas meter. Like a regular seal, it has its own unique number or letter code, which can be recorded in a journal and thereby verify that the seal has not been replaced. Installing such a seal on a meter does not require complex skills.

I didn’t find a single loss, I also found a court - a fine against them for tax evasion.

In general, to give more information against scammers:

1) We meet with them at the office to make a claim (in my case, I didn’t even find an office - at the specified address there is a nine-story residential building). There are no workers. The manager, a 24-year-old boy, refused to meet with me at a time convenient for him - he sent a written complaint about poor-quality measurements. I refused to pay the cost of measurements - 350 rubles for each meter (I have 4 of them and they all showed the same value, like other cases - very interesting, isn’t it? Do they have a scale with one value?) , because does not want to take repeated measurements in my presence and provide the documents required by law.

2) We look carefully at the measurement report - there are no signatures of the measurer (strange, the one who measured refused to sign the document...) and members of the commission. Only two negotiating bosses. Moreover, there was no commission - it stood on the site and did not enter the apartment. What then did the head of the HOA sign if she was not present during the measurements?

3) We read the laws and immediately forget about this piece of paper... We ask them for an accreditation certificate (costs 200 thousand, requires an office, equipment and at least two certified specialists) and a certified methodology (issued only by the Ulyanovsk Metrology Center)

4) We write to the manufacturer with a request for an independent examination and receive from them a colorful color letter with three seals and the signature of the deputy director that there are no norms, no standards, no GOSTs, and no internal specifications to refute or confirm the measurement result . No one has ever measured them and no one is going to do so. (Well, Ulyanovsk is ahead of the rest! And why is it that only we have come up with the idea of measuring something, but not Moscow?))

5) For insurance, we call the metrology center and present to the chairman of the HOA the specified certificates of verification of the certified (and ONLY

in Ulyanovsk an organization) that has the right to check water meters (it turns out that not everyone who gets there has the right to check them...)

You can stop the water meter with some tricky manipulations with a neodymium magnet. To do this, use a magnet in the immediate vicinity of the counter to find the point where it stops completely. This can be the front side, the side surface of the meter, and less often the back wall of the device. The reader performs all manipulations experimentally at his own risk. This information is taken from open sources on the Internet, is provided for informational purposes only, and does not oblige you or push you to anything.

Which metal is not magnetic?

How to make an electric current generator at home

Author Marina Sivtsova asked a question in the Natural Sciences section

What metal does not attract a magnet? and got the best answer

Answer from Evgeny M. Any diamagnetic materials do not attract a magnet, but rather repel it. These are, for example, diamagnetic metals such as Cu-copper, Au-gold, Zn-zinc, Hg-mercury, Ag-silver, Cd-cadmium, Zr-zirconium, etc. But paramagnetic metals, such as Aluminum, are attracted to a magnet . It’s just that when they are not in the ferromagnetic phase, such attraction is very weak and unnoticeable without instruments. A typical example is aluminum. At room temperature it is not in the ferromagnetic phase, but in the ordinary paramagnetic phase. Therefore, if you simply hold it with your hands and bring it to a magnet, you will not feel the attraction. But if you hang a piece of aluminum next to a magnet on a long thread, the thread will deviate slightly from the vertical.

As I noticed, this coin was minted at the Moscow Mint (MMD), more details.

How to magnetize a screwdriver without a magnetizer

As in the case of a special screwdriver, a magnetizer can become unnecessary and an unjustified waste of money and time. This is especially true in cases where the need for a magnetized screwdriver is extremely rare.

And then there is a need to find a handy way to solve the problem. There are several methods on how to magnetize a screwdriver at home without using the device described above:

Using a powerful magnet. If there is such an item, then you can bring the instrument to the desired state in a few minutes. You need to move the screwdriver from the tip to the middle with a magnet. If you always need such a tool, then after work you can leave it on the magnet.

Using an improvised reel. In cases where there is no good magnet, and you need a screwdriver right now, you can make the missing item yourself. To do this, you need to wrap a metal object with paper and varnished copper wire.

For a good result, the wire will need a lot, two to four hundred turns around the selected object. The result is a coil to which voltage must be applied. To do this, you can use a battery, batteries, charger, and so on.

Through the voltage of the household, general power supply network. The same coil is also used here, only the voltage is supplied from the outlet

An important difference is the presence of a fuse that can protect against short circuits. You should be especially careful, because the fuse will burn when connected

Each of these methods should be done following safety rules, otherwise it can cause harm to health. It is best if you do not have the appropriate skills or knowledge to seek help or advice from a person knowledgeable in this area.

Otherwise, each of these methods will be able to magnetize any metal object. The cheapness of each method should be considered individually, based on the availability of the necessary components.

Video on how to magnetize and demagnetize a tool without special equipment

About the special device

Magnetometers are available especially for this purpose, through which a tool can be both given a magnetic charge and removed. For those who do not know how to demagnetize metal, experts recommend doing the following:

First you need to determine what voltage the magnetic field is at. This is a very important aspect, since a mistake can lead to the opposite result.
You also need to measure the voltage on the magnet. It must have the opposite sign.

After these steps, you should touch the magnetometer area to the instrument, as a result of which the latter will be demagnetized.

Orbital movement: charged particles in magnetic fields

Do-it-yourself electric generator: making simple and effective models at home

A positive charge placed in the electric field of a parallel-plate capacitor (see Chapter 17) will move in the direction opposite to the direction of the field lines. The fact is that these lines come out of charges that are located on the positive plate, which repels the positive charge. However, when it comes to a magnetic field, everything is different here due to the fact that the magnetic field does not act on charges moving in parallel. In Fig. Figure 18.4 shows the path of a positive charge moving perpendicular to the magnetic field lines.

Did you notice the crosses in the picture? This is how it is customary in physics to denote the direction of magnetic field lines when they are directed away from the reader and enter the page along a perpendicular to it. It is understood that the crosses indicate the ends of imaginary vector arrows, which are exactly what they look like from behind. A positive charge moves in a straight line until it enters a magnetic field and begins to be subjected to force. As can be verified using the right (or left) hand rule, the magnetic field strength will be directed upward and, as shown in the figure, will make the path of the charged particle curved.

Magnetic fields don't do work...

As you know, a force acts on a charged particle in a magnetic field, but what work does the magnetic field do on this charge? Yes, good question.

When a charge moves in an electric field, it does work with it, due to which the concept of potential difference is introduced, i.e. the work done on the charge \( W \), divided by the value of this charge \( q \) (in other words, the work done on one coulomb):

What work does the magnetic field do on the charge? It can be calculated this way (as shown in Chapter 6):

where \( s \) is the distance. So...Have you noticed yet? Here \( \theta \) is the angle between the force and the direction along which it acts. But, according to the right-hand rule, for charges in a magnetic field the angle \( \theta \) is always equal to 90°, and cos90° = 0, i.e. the work done by the magnetic field on a moving charge is zero.

...but affect moving charged particles

Despite the reluctance to deal with a moving charged particle, a magnetic field can change the direction of that particle's motion (which it does). In fact, if the direction of motion of a charge can be freely changed, then the magnetic field will always do this, since the force acting on the charge is always directed perpendicular to its movement.

Do you remember any other type of motion whose direction is always perpendicular to the applied force? Well, of course, this is the rotational motion that was discussed in Chapter 7. This movement of the charge can be seen in Fig. 18.4 as it passes through a magnetic field. Since magnetic fields act on a charge perpendicular to the direction of its movement, the movement of charges that do not go beyond the magnetic field will be rotational.

Look at fig. 18.5, where the positive charge moves to the left in the magnetic field. The margin \( \mathbf{B} \) is directed upward from the plane of the page towards the reader. How is this known? See all those dots inside the circles? Just as a cross denotes a vector arrow directed away from the reader, so a dot inside a circle denotes an arrow directed towards the reader. Therefore, now the field \( \mathbf{B} \) is directed upward, i.e. from page to reader.

So the field \( \mathbf{B} \) is directed away from the page towards the reader, and the positive charge moves to the left. Using the right (or left) hand rule, we can say that the resulting force is directed upward (more about the right hand rule earlier in this chapter). Under the influence of an upward force, the charge also moves upward. But since, due to the action of the magnetic field, the force is always perpendicular to the direction of movement, it also changes its direction. Here is the formula for the magnitude of force:

Since in this case the velocity vector \( \mathbf{v} \) is perpendicular to the magnetic induction vector \( \mathbf{B} \), then \( \theta \) = 90°, or \( \sin\ !\theta \) = 1, which means that:

Since the force is always perpendicular to the direction of motion, circular motion thus arises. In other words, it is nothing more than the centripetal force needed to provide rotational motion (Chapter 7).

where \( m \) is the mass of the particle, and \( r \) is the radius of the orbit of rotational motion. Thus we get:

From here it is easy to find the radius of the orbit of rotational motion:

Description of the experiment

So, in the experiment we observe how a permanent magnet moves inside a hollow copper pipe at a constant speed. Let's fix an arbitrary point in the body of the copper tube and mentally draw a cross section. A magnetic flux created by a permanent magnet passes through this section of the copper pipe. Due to the fact that the magnet moves along the pipe, an alternating
magnetic flux appears in the cross section of the conductor, either increasing or decreasing, depending on whether the magnet approaches or moves away from the point where we mentally drew the section. An alternating magnetic flux, according to Maxwell's equations, generates a vortex electric field, generally speaking, throughout space. However, only where there is a conductor, this electric field sets in motion the free charges located in the conductor - a circular electric current arises, which creates its own magnetic field and interacts with the magnetic field of a moving permanent magnet. Simply put, a circular electric current creates a magnetic field of the same sign as a permanent magnet, and a certain dissipative force acts on the magnet, and more specifically, a frictional force. The reader may rightly ask the question: “Friction of what against what?” Friction occurs between the magnetic field of the dipole and the conductor. Yes, this friction is not mechanical. Or rather, the bodies do not touch. Well, let! There is still friction!

In general, in words everything looks more or less smooth, but can it be described in the language of mathematics? Let's get started...

Accessories for search magnets

How to update an old cast iron bathtub at home

Thanks to proper use, transportation and storage, the search magnet will last a long time and will not lose its properties ahead of schedule. Accessories protect the unit from environmental influences and ensure efficient use and transportation.

Ropes for search magnets

Chinese cord and clothesline are the first step to failure. They only look very strong, but in practice they will break during the first dive. An “accident” will happen even if the object is too heavy or simply caught on a snag.

In order not to lose the magnet on your first “fishing”, you need to use a very strong rope

When choosing, it is important to consider its characteristics. For example, if the search involves a magnet capable of pulling out an object weighing 400 kg, then the breaking capacity of the cord should be no less

Particular attention should be paid to the diameter, it should be at least 0.4-0.5 cm. But the length depends on the scale of the search; rope of 10-15 meters is in great demand

Ways to bind a search magnet

The main secret of success is proper lacing. Initially, you need to tie the magnet with a constrictor knot, use a surgical one a little higher, and secure it all with an academic one. Pull and cauterize the end. Tie the cord on your hand so you don’t miss it when casting.

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.

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.

Review of popular devices and their prices

The most well-known magnet manufacturers offer devices of varying power and cost:

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.

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.

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.

Important Cautions

Here are a few points that the master should definitely pay attention to:

a sufficiently strong neodymium magnet (including magnets in hard drives) can severely damage the skin

Therefore, it must be used extremely carefully; Do not connect a wire without insulation to the battery. Instead of creating a magnetic field, the current will flow through the bare wire and shock anyone who dares to touch it; Individual electronic items can be seriously damaged under the influence of magnets

Typically, a magnetic screwdriver is too weak to cause problems with your appliances. But still, in this case you will have to use it at your own peril and risk.

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:

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.

What is the cause of magnetization?

Before you become interested in how to demagnetize metal, you should understand the nature of this phenomenon. According to experts, magnetization is carried out by paramagnets, diamagnets and ferromagnets. Products based on alloys of iron, nickel and cobalt have their own magnetic field, which is higher than the external one. Tools become magnetized if they are used near electric motors or other emitters. As a result, they will take away some of the magnetic properties.

Types of magnetic clips

There are many types of magnetic clips, let's look at the most common:

Label. It is small in size, fixed directly to clothing, often in a place where the buyer does not look. If it is damaged in the store, the signal will immediately turn on. There is no splatter paint inside the label.
RF tag. Triggers at the exit when trying to secretly remove an item. It can be easily removed at home without damaging clothes and does not contain paint inside.
Magnetic-acoustic sensor. It looks like a plastic tag with a convex part, inside of which there is a bottle of paint. When you try to remove it without a special device, it closes even more tightly or splashes neon paint around itself.

Equation of motion

Now it's time for the equation of motion. Using Newton's second law, it will be very easy to write it down. Solving the equation for is not interesting, because, well, the coordinate simply changes at a constant speed. It is much more useful to know how quickly the fall stabilizes, what the steady-state speed of fall is. In general, we need to solve this equation for speed. And the solution will be like this. Here is the damping coefficient. The characteristic time for reaching a steady state of decline is . Initial speed - , steady speed - . In general, this is the equation of a parachutist. This is probably why the Popular Mechanics article is called “Magnetic Parachute”.

Magnetization is illegal

Government Resolution No. 354, which caused a stir, allowed owners to be punished for damaging metering devices by billing them for water consumption based on the pipe’s capacity for six months. These are huge amounts of hundreds of thousands of rubles. Meanwhile, as it turned out, there is no legal basis for checking and measuring the so-called “magnetization”...

How to make a magnetic screwdriver at home

A magnetic screwdriver is a useful tool in the household, but it is not used very often. Therefore, for her, the “magnetizer”, in fact, risks becoming simply an unjustified item in the expense item.

It follows that there is a need to find a suitable method that explains how to make such an instrument at home using improvised means. That is, without using a magnet in principle. And there are several options for how this can be done.

Improvised reel

If you don’t have any magnet at hand, but you need to magnetize a screwdriver here and now, you can make a suitable device yourself.

All that is required is to wrap any metal object with a layer of plain paper and varnished copper wire.

To get it right the first time, you will need a decent length of wire - enough for 200-400 revolutions (depending on the size of the object). This will create a coil to which voltage can be applied.

Voltage can be obtained, for example, from a battery, charger, etc.

Household electrical network

This option will also require a homemade coil. The only difference is that the voltage is supplied from a household outlet. A very important detail is the presence of a fuse that will help avoid short circuits.

Extreme care must be taken as there is a risk that the fuse may burn out when connecting

Hammer

Surprisingly, you can magnetize a screwdriver even with a regular hammer. This can be done if you hit the screwdriver shaft a lot and often. The trick is that there are enough iron atoms in the steel from which the shaft is made. And hammer blows help align them in the same direction and thereby create a magnetic field.

This may take some time, but this method can be useful if you really don’t have anything other than a hammer at hand at the right time. It is easy to demagnetize the tool in the same way - by hitting the shaft several times. This will again disperse the iron atoms, destroying the magnetic field.

Battery

This method is used more often than others, so it will be described in more detail.

For magnetization you will need:

6-9V battery;
duct tape;
electrical wire about a meter long (core dimensions up to 1.3 mm);
insulation stripping tool.

What do we have to do:

Remove approximately 2.5 centimeters of insulation from the ends of the wire. The diameter of the core must be at least 0.6 mm, because too thin a wire risks overheating. And too thick won't do any good.
Thanks to the wire with thin insulation, magnetization will be more effective. The best result will be obtained if you use enameled winding wire. To clean it, you can use 220 grit sandpaper.
Wrap the wire tightly around the screwdriver shaft 10-20 times. If the instrument is short, you can wrap it in a couple of layers. But you should not change the direction of the winding. For example, the correct way would be to move right, left and then right again. If necessary, the wire can be secured with tape.
It is advisable to wear rubber gloves first as a protective measure. They will protect against electrical sparks and possible electric shock.
Attach the ends of the wire to the contacts of the battery - it is the source of direct current here. The incoming electricity will create the necessary magnetic field.

Important! It is not recommended to use batteries of higher power if the technician does not have sufficient experience in handling this device correctly. The fact is that any battery more powerful than nine volts needs to be attached to the wire for literally a second or two

And this is enough for magnetization.

The tool shaft wrapped in wire will be magnetized. However, you should be careful, since in the process both the contacts of the current source and the wire will heat up quite quickly. You can remove the battery within a minute.

Now you can try to lift the screw with a screwdriver. If it doesn’t work, and the magnetic properties disappear immediately after disconnection, you can try magnetizing again. But this time make more turns along the shaft.

It is important to carry out any of the above methods in compliance with safety precautions. Otherwise, there is a risk of causing serious harm to your own health.

If the master does not have the necessary experience or knowledge, it makes sense to consult a specialist for advice.

It's easy to demagnetize a screwdriver. If you need it urgently, a few blows on the shaft will suffice. If not, after a certain time it will lose its magnetic properties on its own.

About a homemade device for demagnetization

Judging by numerous reviews, tunnel devices can be used for this purpose. The design of such a device includes a coil connected to the mains. There is a hole inside the coil where the workpiece should be inserted. Demagnetization can be successfully performed using a homemade electromagnet. It is not difficult to make it from some materials and available tools.

The operating principle is to control the current. Magnetization is carried out by constant voltage, and by alternating voltage - the opposite effect. The reels are made from old TVs. It is enough to disassemble it and remove the demagnetization loop in the kinescope. Then it is folded at least twice. It all depends on what diameter the home craftsman needs.

It happens that one loop is not enough. In this case, it can be supplemented from another old TV. Further, the design is equipped with a fuse button, which will ensure uninterrupted operation. A device designed for 220 Volts is suitable for permanent use, and 110 Volts are suitable for short-term connections. If the product is 12 V, then experts recommend using a transformer. With such a homemade mechanism, you can successfully demagnetize even large parts.

A kinescope from a TV is by no means the only option for a home craftsman. Judging by the reviews, good products are made from old reel-to-reel players. The part to be processed should be placed near the product.

Magnetic field and metals that conduct it

A magnetic field is a force that can influence electric charges, atomic nuclei, and simplest particles. This is matter that arises from the interaction of particles that have their own charge. All substances react to this field, and some emit it.

Depending on the reaction, the substances are distinguished:

Ferromagnetic materials react to fields and retain magnetization. Thus, they themselves begin to emit their own field.
Paramagnetic materials - the electrons in their composition react to a magnetic field so weakly that such a reaction can only be detected using special measurements. Such substances include platinum, aluminum, oxygen.
Diamagnets are substances that do not attract, but, on the contrary, repel from a magnet, exhibiting negative susceptibility. Diamagnets include copper, water, carbon, gold, and silver. Most substances known to science are diamagnetic.

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About working with large batches of parts

There are times when it is necessary to remove magnetization from many metal products. This is possible through the desired temperature. How to demagnetize metal by heating? According to experts, this will require heating the products to a certain state, which is also called the Curie point. Iron is heated to a temperature of 768 degrees. A ferromagnet will require a higher range. Upon reaching the desired temperature threshold, spontaneous magnetized domains are formed.

The process goes as follows. First, one part is brought to the Curie point. Next you should cool it. It is important that it is not affected by external magnetic fields (the only exception is the Earth’s magnetic field). Next, using a sensitive induction meter, the maximum magnetization is assessed. Next, in the control zone at a distance of no more than 2 cm from the part, the range of different values obtained by the MF-23 or MF-23M indicator is measured. Magnetic induction should be +/- 2 mT.