Effect of parameters on nickel molybdenum disulfide composite coatings by laser-assisted jet electrodeposition

This research utilizes laser ablation to generate numerous micrometer-scale structures on SUS304, followed by jet electrodeposition of micrometer to submicrometer Ni-MoS2 composite coatings on these structures. The effects of laser power, scanning spacing, current density, and MoS2 concentration on the surface structure and wettability of the coatings are investigated. Experimental results demonstrate that the composite coating prepared at a laser power of 8 W, scanning spacing of 50 mu m, current density of 30A/dm2, and MoS2 concentration of 2 g/L exhibits the best surface wettability (contact angle (CA) of 154.5 degrees, roll-off angle (RA) of 5.9 degrees). Investigation reveals that the composite coating can adsorb hydrocarbons from the air, facilitating an effective "lotus leaf" effect between the air and the coating, thus exhibiting superhydrophobicity. Additionally, the corrosion resistance and friction performance of the superhydrophobic composite coating are studied. Compared to untreated SUS304, the superhydrophobic Ni-MoS2 composite coating shows a higher corrosion potential correction, lower corrosion current density, and higher polarization resistance. Moreover, the friction coefficient of the composite coating decreases from 0.76 for bare SUS304 to 0.47, indicating excellent friction performance and improved mechanical stability.