Study on Ultrasonic Electroforming Ni-P Coatings on NdFeB Permanent Magnet

Li Li; Xiang Cheng; Feng Shi Yin

doi:10.4028/www.scientific.net/AMR.535-537.1275

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Study on Ultrasonic Electroforming Ni-P Coatings on NdFeB Permanent Magnet

Abstract:

In order to improve the corrosion resistance of sintered NdFeB magnet, experiments are done by the new process which involves ultrasonic electroforming Ni–P alloys. The influence of ultrasonic on electroforming Ni–P alloy on NdFeB was studied by using microscope, adhesion test and NaCl solution immersion test.The results showed that the Ni–P alloy deposit on NdFeB is rough and has poor adhesion without ultrasonic agitation; However, the Ni–P alloy deposit on NdFeB with ultrasonic agitation has the following advantages: uniform and smooth deposit grains, strong adhesion and good corrosion resistance.