What is the surface treatment of aluminum sheets?

Surface treatment of aluminum sheets involves various processes to enhance their properties or appearance. These include anodizing, which creates a protective oxide layer; painting, which provides a decorative and protective coating; powder coating, a durable and corrosion-resistant method; polishing, which gives a shiny finish; and etching, which creates decorative patterns. Other treatments include chemical conversion coatings, such as chromate and phosphate, for corrosion resistance, and thermal spraying for wear resistance. Each method serves a specific purpose, from improving durability to aesthetic enhancement.