Temperature, since sintered NdFeB possess a negative temperature coefficient, the instantaneous or the continuous highest temperature of the working environment will give demagnetization in different and certain percentage, including reversible and irreversible, recoverable and unrecoverable demagnetization.
Humidity, Sintered NdFeB itself is easy to be corroded, rusted and oxidized, we usually take the method of surface treatment to protect it, but we can't keep away the influence to magnet caused by ambient humidity fundamentally. The drier of the working environment, the longer of the working life of the magnet.
