Coil steel coatings generally consist of four basic components: film-forming substances (resins), pigments (including physical pigments), solvents and additives. Coil coating is a continuous film coated on the surface of a protected or decorated object and can be firmly attached to the coating. It is usually a viscous liquid made of resin, oil or emulsion, added or not added with pigments, fillers, added auxiliaries, and prepared with organic solvents or water.