Aluminum alloy is an alloy material composed of aluminum with other metal elements (such as copper, magnesium, zinc, silicon, etc.) or non-metallic elements (such as silicon). The surface treatment process of aluminum alloy is varied, including anodizing, spraying, electroplating, etc., to improve its corrosion resistance, aesthetics and functionality. Anodizing: By forming a dense oxide film on the surface of aluminum alloy, improve the corrosion resistance, hardness and wear resistance of aluminum alloy. Anodizing film can also be dyed in various colors to enhance the aesthetics of aluminum alloy. Spraying: The paint is sprayed on the surface of aluminum alloy to form a protective layer to improve the corrosion resistance, weather resistance and aesthetics of aluminum alloy. Spraying process includes powder spraying, paint spraying, etc. Electroplating: Plating a layer of metal or alloy on the surface of aluminum alloy to improve its corrosion resistance, conductivity and aesthetics. Common electroplating processes include chrome plating, nickel plating, etc.