PCM is short name of pre-coated steel sheet, a kind of metal composite material, coated with a polymer paint on the metal of aluzinc stteel, electro-galvanized steel, and hot-dip galvanized steel. It combines the strength and processability of steel with excellent corrosion resistance and flexibility of the paint film. It is widely used in the construction industry and home appliances, with applications expanding into areas such as bus shelters, vending kiosks, and steel furniture.