Galvanized steel coil refers to a layer of zinc metal coated on a steel plate to achieve anti-corrosion and aesthetic effects. This category usually includes hot-dip galvanized steel coils and cold-dip galvanized steel coils, but when referring to galvanized steel coils, it mostly refers to cold-dip galvanized steel coils. Hot dip galvanized steel coil is a special type of galvanized steel coil, whose galvanizing process involves heating the original steel plate to a certain temperature and immersing it in molten zinc solution for galvanizing treatment. This method forms a thick layer of zinc alloy on the surface of the steel plate.