China Nonferrous Metallurgy

In recent years, the electrodeposition technology of aluminum and aluminum alloy coatings prepared by electrodeposition in ionic liquids has attracted much attention as a new green process, and aluminum and aluminum alloy coatings have been widely used in aerospace, electronics, automobiles and many other fields.Ionic liquid as an electrolyte has the advantages of high conductivity, wide electrochemical window, etc. Electrodeposition of aluminum and aluminum alloy coatings by ionic liquid can effectively improve the corrosion resistance, strength and hardness of the coatings, which provides a feasible method for strengthening some materials with low corrosion resistance and poor mechanical properties.In this paper, the research progress of electrodeposition of aluminum and aluminum alloys in different ionic liquid systems in recent years is systematically reviewed.The present situation and advantages of different types of ionic liquid electrodeposition of aluminum and its alloys are introduced.The shortcomings and improvement measures are analyzed and summarized.AlCl3 ionic liquid has some defects, such as low stability and complex synthesis process, which limit its industrial application；Adding an appropriate amount of additives can make up for the shortcomings of insufficient liquid stability, complex preparation process and expensive preparation raw materials, but there are still problems of high viscosity and high cost.At present, multi-functional ionic liquids are becoming an important research field in chemistry and materials science. With the deepening of research and the development of technology, ionic liquids are expected to play a greater role in future industrial production.