Study on electrodeposition of CoNiW coating on 1045 steel as piston ring materials and its wear resistance performance

Abstract

The CoNiW alloy coating is electrodeposited on the 1045 steel as piston ring materials by electrodeposition method to greatly improve the wear resistance performance. The electrodeposition of CoNiW belongs to a kind of induced co-deposition. The tungstate ions in the plating solution are beneficial to increase the deposition mass. Moreover, tungsten atoms could occupy the lattice junction of nickel and cobalt atoms to generate lattice distortion, which will reduce the grain size, decrease the surface roughness and improve the wear resistance performance. Compared with Co coating and CoNi coating, the CoNiW electrodeposited coating has the best wear resistance performance with the smallest surface roughness (0.179 µm) and the thinnest wear scar (7.4 µm average depth).