Hot dip galvanized steel coil: The thickness of the galvanized layer is generally between 60-200um. Due to the high galvanizing temperature, the formed galvanized layer is more uniform and stable, thus having a longer service life. Cold galvanized steel coil: The thickness of the galvanized layer is between 5-15um, which is relatively thin. Although it can also provide some anti-corrosion effect, its anti-corrosion ability is weaker compared to hot-dip galvanized steel coils.

Galvanized steel coil is a steel plate material formed by galvanizing hot-rolled or cold-rolled steel strip as the substrate. Galvanized steel coils are coated with a layer of zinc on the surface of the steel to enhance its corrosion resistance, wear resistance, aesthetics, and processing performance. This layer of zinc not only effectively prevents the oxidation of steel, but also forms a protective film on the surface of the steel, thereby extending its service life.