Definition for galvanized steel and galvalume steel sheet
Galvanized steel sheet(GI): The thin steel sheet is immersed in a molten zinc bath to make a layer of zinc adhere to the surface. This galvanized sheet has good adhesion and weldability of the coating.
Galvalume steel sheet(GL): hot-dip galvalume steel sheetis a pre-coated steel sheet obtained by hot-dipping a layer of Al-Zn coating on both sides of cold-rolled steel sheet with various strength and thickness specifications as the base material. The mass percentage of the coating composition is 55%. %Al, 43.5%Zn, and 1.5%Si, which combine the physical protection and high durability of Al with the electrochemical protection properties of Zn. In addition, the surface has a highly decorative bright silver-gray color and regular patterns, and has a floating and convex feeling.