Question

Write any two cause of demagnetization?

Answer 1

Contributing factors which may cause magnet strength loss include:

(1) Low-cost inferior rare earth magnet elements .

(2) Settling in strength loss. This is usually 5-7% in the first 6 months for high-grade magnets.

(3) Poor quality manufacturing procedures, including welding.

(4)Oxygen and moisture absorption, corrosion .

(5)Magnet damage resulting from mishandling, impact, or excessive vibration .

(6)Magnet wear from abrasive product types and/or high-tonnage lines .

(7) Operating temperatures and thermal shock.