In the home appliance industry, coated steel sheet materials are widely used for exterior decoration, mainly because of their excellent aesthetics and functionality. Coated steel sheets not only provide a variety of colors, textures and gloss options to meet consumers’ diverse needs for exterior design, but also have excellent corrosion resistance, scratch resistance and anti-pollution properties, which can effectively extend the service life of home appliances. In addition, its smooth surface is easy to clean, and the coating material can play a role in moisture and rust prevention, improving the overall quality and practicality of home appliances. Therefore, coated steel sheets have become an ideal material for the exterior decoration of home appliances.