Investigation of Ultrasonic electroplating Ni-P coatings on Nd-Fe-B Permanent Magnet

摘要

In order to improve the corrosion resistance of Nd-Fe-B, the new technological process is done which involves electroplating Ni-P alloys with ultrasonic. The influence of ultrasonic on electroplating Ni-P alloy on Nd-Fe-B was studied by using microscope, adhesion test and NaCl solution immersion test. The results showed that the Ni-P alloy deposit on Nd-Fe-B is rough and has poor adhesion without ultrasonic agitation;;however, the Ni-P alloy deposit on Nd-Fe-B with ultrasonic agitation has more compact and uniform microstructure, smoother morphology. At the same time, the adhesion and corrosion resistance are greatly enhanced.