Magnets are also called magnets. Both artificial magnets and natural magnets have strong magnetic properties, but they have spontaneous magnetization.
Why do magnets demagnetize?
1. In the use environment of sintered NdFeB, the instantaneous maximum temperature and the continuous maximum temperature will produce different degrees of demagnetization on the magnet itself, including reversible and irreversible, recoverable and irreversible. Magnetizing the magnet again does not restore the highest magnetic force of the magnet itself.
2. NdFeB is easy to corrode and oxidize. Generally, we use surface treatment to protect permanent magnets, such as electroplating nickel, aluminum, gold, etc. But it can not fundamentally solve the effect of environmental humidity on the magnet. The more humid the environment is, the NdFeB ultra-high-strength magnets are still prone to oxidation and corrosion, and the knowledge of electroplating slows down the speed of oxidation.
3. Strong impact will demagnetize the magnet, and even more serious will cause the magnet to shatter on the spot.
At present, strong magnets are all artificially made. Because of their strong strong magnetism, they are called the most popular magnetic products on the market. Therefore, the protection method that is not used for a long time is also a problem that needs to be solved. Strong magnets It is a spontaneous magnetization phenomenon, so what should be paid attention to during the storage process?
Strong magnets should not be close to electronic equipment, otherwise, it will affect the electronic equipment and control circuit and affect the use.
2. Do not store magnets in a humid environment to avoid oxidation, which will cause changes in appearance, physical properties, and magnetic properties.
3. Do not place magnets near floppy disks, hard drives, credit cards, magnetic tapes, debit cards, TV picture tubes, etc. If the magnet is close to the magnetic recorder and other devices, it will affect or even destroy the recorded data.
4. The magnet cannot be knocked and vibrated violently; the hoof magnet should also add a piece of soft iron to the two poles to connect the two poles, and turn the north and south poles of the adjacent magnets upside down.
5. If people who are sensitive to metal objects approach the magnet, the skin will be rough and red. If the above reaction occurs, please do not touch the strong magnet.
The magnetic material of the main strong magnet can be controlled within the normal range of the temperature resistance of the rare earth strong magnet, and the demagnetization of the strong magnet can be ignored.
When storing strong magnets, the storage environment is generally required to be relatively dry. It should also be noted that in the process of preservation, do not let the strong magnets encounter chemicals such as acid and alkali, so as not to affect the strong magnets. Corrosion, rust and other phenomena occur, so we can place a strong magnet on a layer of wood, which can effectively prevent moisture.