Microstructure and Tribological Performance of Electrodeposited Cr Coating with Trivalent–Chromium Electrolyte

A chromium (Cr) coating was fabricated on 45 steel by electrodeposition with a trivalent–chromium (Cr3+) electrolyte. The morphologies and element distributions of the obtained were analyzed using scanning electronic microscope, energy dispersive spectrometer, atomic force x-ray diffraction, photoelectron spectroscopy. effects normal load sliding speed tribological performance Cr friction tester. results show that roughness 85.5 nm is composed phase. average coefficients (COFs) under loads 1 N, 3 5 N are decreased from 1.08 to 0.69, exhibiting excellent reduction; while its wear rates increase load, resistance becomes poor. Moreover, COFs at speeds 600 times/min, 700 800 times/min in range 0.71–0.76, rate lowest showing reduction best.