Abstract
In this study, the Nd-Fe-B powders coated by Ni-P alloy film with electroless nickel process was investigated. The coated Nd-Fe-B powders were pressed to the Nd-Fe-B magnets and then these magnets were immersed in HMTA alcohol solution or PU aqueous solution. We analyzed the compositions of the Nd-Fe-B powders by ICP-AES and observed the surfaces of the Nd-Fe-B powders by SEM. Furthermore, We examined the anti-corrosion effect of the coated Nd-Fe-B powders and their magnets with environment test at the condition of 90% RH and 80℃. The results showed that the anti-corrosion effect of the Nd-Fe-B powders coated with electroless nickel was improved. However, the magnets made of Nd-Fe-B powders coated with electroless nickel always produced a crack on the surface. This phenomenon disappeared after the magnets immersed in PU aqueous solution. This anti-corrosion effect of the Nd-Fe-B magnets coated with electroless nickel was also improved obviously.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
