Preparation and Corrosion Resistance of Electroless Plating of Ni-Cr-P/Ni-P Composite Coating on Sintered Nd-Fe-B Permanent Magnet
This paper introduces electroless plating Ni-Cr-P/Ni-P composite coating technologies and techniques on the Nd-Fe-B permanent magnet surface. It has got a Ni-Cr-P/Ni-P composite coating successfully on the Nd-Fe-B substrate surface through rational processing plan. The coating surfaces are bright and have low Porosity, good binding between the electroless plating and Nd-Fe-B matrix. The experimental results show that the composite coating prepared by Ni-Cr-P electroless plating (15min) and Ni-P acidic electroless plating (45min) has amorphous structure, simple process and better anticorrosion property in both alkaline and acidic medium.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
M. M. Wu and B. Y. Lou, "Preparation and Corrosion Resistance of Electroless Plating of Ni-Cr-P/Ni-P Composite Coating on Sintered Nd-Fe-B Permanent Magnet", Advanced Materials Research, Vols. 284-286, pp. 2187-2190, 2011