LAUSR

Abstract A novel Ni–B/TiC–Y2O3 nanocomposites has been synthesized by one-step pulse electrodeposition at different duty cycle as protective coating. The effects of pulse duty cycle on its structural, surface, corrosion an wear behavior were evaluated. The coating exhibits compact and hill-valley like structure. The average roughness (Sa) was about 56–161 nm and duty cycle of 30% benefits low roughness and fine-grained structure. The crystallite size is 16–19 nm and slightly varied with process parameters. The coating exhibits the preferred orientation of Ni (111) texture. AFM and XPS were utilized to analyze the surface properties. Electrochemical impedance and wear studies illustrated that duty cycle of 30% was the optimal parameter for the best corrosion and wear resistance, exhibiting an excellent long-term performance stability in 3.5 wt% NaCl corrosive solution. This coating exhibits good potentiality for various industrial applications in aggressive medium.