The commonly used coatings for color coated steel plates are polyester (PE), followed by silicon modified resin (SMP), polyvinylidene fluoride (PVDF), etc. The thickness is generally 20-25u on the surface and 8-10u on the back. The external use of the building should not be lower than 20u on the surface and 10u on the back. The commonly cited standards for color coated steel sheets are American ASTM A527 (galvanized), ASTM AT92 (aluminum-zinc), JIS G3302, EN/0142, Korea KS D3506, Baosteel Q/BQB420.
Color-coated steel sheet is a product made of cold-rolled steel sheet, electro-galvanized steel sheet, hot-dip galvanized steel sheet or galvanized steel sheet after surface degreasing, phosphating and chromate treatment, and then coated with organic paint and baked. . The hardness of the coating film, as well as good non-pulverizing, gloss retention and flexibility are limited. The service life is 10-15 years.
