Preparation and Performance Study of Zinc Dibenzyl Dithiocarbamate Self-Assembled Film on Electrodeposited Cu–Ni Alloy Surface

This study developed a green and efficient surface protection method for Cu–Ni alloys. A zinc dibenzyl dithiocarbamate film was prepared on the surface of electrodeposited Cu–Ni alloys using the self-assembly method to improve the material's corrosion resistance in seawater. The influence of zinc dibenzyl dithiocarbamate concentration and self-assembly time on the corrosion resistance of the self-assembled films was investigated through electrochemical testing. The findings revealed that at a zinc dibenzyl dithiocarbamate concentration of 10 mmol/L and a self-assembly time of 20 min, the self-assembled film exhibited the most robust corrosion resistance, achieving a maximum corrosion inhibition efficiency of 97.70%. The self-assembly and adsorption mechanism of zinc dibenzyl dithiocarbamate were explored using molecular dynamics simulations and adsorption isotherms. The protective effect of self-assembled films was visually observed through salt spray testing. Zinc dibenzyl dithiocarbamate self-assembled film technology has high application prospects in the field of marine anti-corrosion.