Research Progress on Corrosion Mechanism and Surface Protection Technology of Sintered NdFeB Permanent Magnets
LI Hong-ying;HAO Zhuang-zhi;LIU Yu-hui;ZHU Wang-wei;CHEN Yun-zhi;School of Materials Science and Engineering,Central South University;Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University;Nonferrous Metal Oriented Advanced Structural Materials and Manufacturing Cooperative Innovation Center;Hunan Rare Earth New Energy Materials Co Ltd;
The corrosion mechanism of NdFeB permanent magnetic material in different environments and recent research progress in the surface protection technology were systematically introduced. The present status of surface protective coating technology and existing problems in the technology application were analyzed. The development trend of surface protection technology for NdFeB permanent magnetic material was put forward.