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The main reason for the aging of NdFeB magnets

 1, wet

A humid or salty environment is not conducive to the preservation of NdFeB. Long-term in this environment will cause the surface of NdFeB to corrode, which will lead to the appearance of NdFeB aging.

The solution is to choose a coating for a 24-hour salt spray test or a 48-72 hour salt spray test for a longer period of time.

2, high temperature

NdFeB has N grades and M grades and other grades.

Different grades have different maximum working temperatures and Curie temperatures. For example, the N-plate grade NdFeB has a maximum operating temperature of 80 °C. Above this temperature, there is a loss of magnetism of NdFeB. At Curie temperature, it completely loses its magnetism. Generally, when the highest temperature is reached, the magnet is damaged, resulting in aging damage of the NdFeB.

Temperature is a main factor that affects the magnetic properties of powerful magnets. When the temperature is continuously increased, the magnetic properties of strong magnets will be greatly weakened, resulting in a relatively weak magnetic field of strong magnets.Thereby the magnet is partially removed from the magnetic properties.


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