钕铁硼永磁材料腐蚀机理及防护研究进展*

doi:10.13385/j.cnki.vacuum.2020.05.10

Abstract

Abstract: As the third generation of rare earth permanent magnet material, NdFeB occupies a pivotal position in the magnetic materials field. NdFeB is widely used in fields such as national defense, aerospace, information communications, automobiles, energy, energy conservation, environmental protection and medical equipment. However, the low resistance of NdFeB to corrosion limits its application to further expand. The phase composition, corrosion process and corrosion products of NdFeB are reviewed in this study. The corrosion characteristics of NdFeB such as high temperature oxidation, wet heat hydrogen absorption and electrochemical corrosion were described. The corrosion protection technology of NdFeB is discussed from the aspects of corrosion resistance improving and surface coating protection, focusing on the basic principles, research progress and development direction of electroplating, electroless plating, organic coating and physical vapor deposition. The research of NdFeB corrosion protection technology is the key to promote the application of NdFeB permanent magnets.

Key words: NdFeB, corrosion mechanism, protection technology, vacuum coating

CLC Number:

TM273

DENG Wen-yu, WANG Peng-yang, QI Li-jun, DUAN Yong-li, SUN Bao-yu, WAN Yi, ZHANG Xin-jie, XIE Yuan-hua, DU Guang-yu, LIU Kun. Research Progress on Corrosion Mechanism, Protection of NdFeB Permanent Magnet Materials[J].VACUUM, 2020, 57(5): 45-51.

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Research Progress on Corrosion Mechanism, Protection of NdFeB Permanent Magnet Materials

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