How is the steel coil coated

Coating of steel coils is usually done by coating or spraying.
The coating method usually uses a coating machine to coat polyester film or polyethylene film on the surface of the steel coil, and then fix the film on the surface of the steel coil through heating, cooling, traction and other processes to form a firm protective layer.
The spraying method usually uses spraying equipment to spray polyester film or polyethylene film on the surface of the steel coil, and fix it on the surface of the steel coil through heating, cooling and other processes to form a firm protective layer.
The purpose of coating is usually to protect the surface of the steel coil from corrosion, oxidation and other factors, and it can also improve the appearance quality and processing performance of the steel coil.