The coated steel plate is an upgraded product of the color steel tile. The ordinary color steel tile is made of cold-rolled steel plate and hot-dip galvanized steel plate as the substrate, after surface degreasing, phosphating, chromate treatment, and baking with organic coating. steel plate. Color steel is easy to rust and corrode and has a short service life. The coated steel plate is a composite metal plate, including a galvanized or aluminized zinc metal substrate, a chemical treatment layer, a polymer conversion layer, and a high weather-resistant and anti-corrosion film layer (PVDF fluorocarbon film). It is a cost-effective building. Roof and wall maintenance materials, materials that meet the various performance combinations required by the modern construction industry, and film-coated steel plates make full use of the rigidity and strength advantages of metal substrate materials and are firmly combined with high-weather-resistant engineering resin films. Due to the weather resistance, ultraviolet resistance, humidity and heat aging resistance, acid and alkali corrosion resistance, oxidation resistance (sodium hypochlorite and ozone), and fire resistance of the coated steel plate, the mechanical, chemical, physical and other comprehensive properties of different component materials can be fully exerted in modern buildings. widely used.