The coating structure of the aluminum-zinc alloy coated steel sheet is Zn-Al alloy, and the coating composition is 55% Al, 43.3% Zn, and 1.6% Si. Because of its excellent corrosion resistance, this kind of steel is gradually replacing galvanized steel and is widely used all over the world.
The surface is smooth and has excellent atmospheric corrosion resistance. Its atmospheric corrosion resistance is 2-6 times higher than that of hot-dip galvanized coil with the same coating thickness. At the same time, it has high temperature corrosion resistance similar to hot-dip galvalume steel coil, It can be used for a long time at a high temperature as high as 315℃, and it can be used for a long time at a temperature of 500℃～600℃; it has good water resistance and soil corrosion resistance, and its water corrosion resistance is better than hot-dip galvanized coil and hot-dip galvalume steel coil. Soil corrosion is better than hot-dip galvanized steel coil; it has excellent paintability and good processing performance, and its processability and weldability are similar to hot-dip galvanized coil, can be processed by cold bending, stamping, etc., and has a good appearance .