Effect of Mechanical Attrition on Structure and Property of Electroplated Ni-P Coating on Magnesium Alloy

Abstract

Mechanical attrition (MA) is applied to assist the electroplating Ni-P coating on a magnesium alloy substrate. The influence of MA on the microstructure and electrochemical performance of the coating was studied with SEM, XRD, electrochemical impedance spectroscopy (EIS) and polarization curves. The results show that under MA, the Ni-P electroplating becomes compact and free of cracks and pores, leading to significant improvement in the coating corrosion resistance. MA promote transformation the coating from amorphous state to crystalline one and produce an obvious transition layer at the coating-substrate interface, which is beneficial to enhancing the coating adhesion strength and other mechanical properties.

Robust Super-Hydrophobic Coating Prepared by Electrochemical Surface Engineering for Corrosion Protection

“…Among these methods, coating is a simple and effective way for corrosion protection with low cost. In the past several years, various coating techniques have been studied-like chemical vapor deposition (CVD) [4], plasma treatment [5][6][7][8], thermal spray [9], electrochemical methods [10][11][12][13][14][15][16][17][18], sol-gel [19,20], magnetron sputtering [21][22][23], etc. The above-mentioned methods mostly involve post-treatment or high temperatures in the fabrication process, which can damage the coating and/or substrate with relatively low melting points [24].…”