Process Improvement of Zinc Electrodeposition in Choline Chloride-Urea Low Eutectic Ionic Liquid

A choline chloride and urea electrolyte (CU electrolyte) was prepared, and the single factor test method was used to investigate the effects of main salt (ZnCl₂) content, temperature, time, current density on the corrosion resistance of (zinc) coatings through microscopy morphology observation, electrochemical performance testing, microhardness testing, etc.The results showed that when the content of ZnCl₂ was 0.5 mol·L^-1, the temperature was 70 ℃, the time was 20 minutes, and the current density was 1.2 A·cm^-2, the deposited coating had the best corrosion resistance in 3.5% NaCl, high microhardness (109 HV), and good appearance quality (surface roughness of 0.498 μm).