The effect of ultrasonic power on high temperature wear and corrosion resistance for Ni based alloy composite coatings

TiO2-reinforced Ni-W co-depositions are successfully produced by ultrasonic-assisted pulse electrodeposition. The effect of ultrasonic powers and concentration of TiO2 on the surface morphology, surface roughness, nano -mechanical, anti-corrosion, high-temperature wear, and friction behavior of the Ni-W co-depositions were sys-tematically investigated. The experimental results indicate that (1) there is an optimal incorporating amount (about 20 g L-1) of TiO2 in the plating bath and ultrasonic power (50 W) for achieving the highest high -temperature wear, corrosion resistance and excellent nanomechanical properties (hardness of-8 GPa and elastic modulus of-209 GPa), maximum TiO2 incorporation rate (24.4 wt% TiO2); (2) the composite coating refined the microstructure and reduced crystallite size of the coatings, and obtained dense microstructure. TiO2- reinforced Ni-W co-deposition produced by optimal conditions open up new avenues in alternative to hard chromium and is expected to be widely applied in defense industry, automobile and electronic systems.

Automated summary

TiO2-reinforced Ni-W co-depositions were successfully produced using ultrasonic-assisted pulse electrodeposition. The effects of ultrasonic powers and TiO2 concentration on the properties of the co-depositions were systematically investigated. The experimental results demonstrate that the co-depositions produced under optimal conditions exhibit excellent performance and have potential applications in replacing hard chromium.