Progress of Electrodeposition of Nickel-Based Anticorrosive Wear-Resistant Coatings in Deep Eutectic Solvents

Abstract Nickel metal plating exhibits advantages such as high hardness, excellent wear and corrosion resistance, and an attractive appearance. It is widely utilized used as both a decorative and functional coating in industries like metallurgy and chemical engineering. Deep eutectic solvents (DESs), as a novel green solvent, possess a wide electrochemical window, good chemical stability, non-toxicity, biodegradability, simple preparation, and low cost. They also exhibit low volatility and stability in air and humid environments. These properties address the drawbacks of organic solvents (high volatility) and traditional ionic liquids (complex preparation processes and high costs), offering broad application prospects for metal electrodeposition. This review summarizes recent advances in the electrodeposition of nickel and nickel-based alloys using choline chloride-based DESs as electrolytes, discusses the corrosion and wear resistance of the coatings, and further explores their future research directions, with particular emphasis on the optimization of electrolyte composition for enhanced coating performance and the development of multi-element composite coatings to achieve multifunctional surfaces.