The coating structure of Al Zn alloy coated steel plate is Zn Al alloy, and the coating composition is 55% Al, 43.3% Zn and 1.6% Si. Due to its excellent corrosion resistance, this kind of steel plate is gradually replacing the galvanized sheet and is
widely used all over the world.
It has smooth surface and excellent atmospheric corrosion resistance. Its atmospheric corrosion resistance is 2-6 times higher than that of hot-dip galvanized sheet with the same coating thickness. At the same time, it has similar high-temperature corrosion
resistance as hot-dip aluminum plate. Aluminum zinc alloy coated steel plate can be used for a long time at high temperature up to 315 ℃ and long-term use at 500 ℃ - 600 ℃. It has good water and soil corrosion resistance Its water corrosion resistance
is better than that of hot-dip galvanized sheet and hot-dip aluminum sheet, and its soil corrosion resistance is better than that of hot-dip galvanized sheet; it has excellent coating property and good processing performance, and its processability and
weldability are similar to that of hot-dip galvanized sheet, which can be processed by cold bending and stamping, and has a good appearance.
Al Zn alloy coated steel sheet has the characteristics of hot-dip galvanized steel sheet and hot-dip aluminized
steel sheet. Therefore, Al Zn alloy coated steel sheet can be used wherever hot-dip galvanized steel sheet is used, and it can also partially replace hot-dip aluminized steel plate. Its application range is wide, such as roof panel, light steel keel,
heating radiator, car body, fuel tank, armored steel strip of cable and plastic The frame materials, granaries, shipping containers, household appliances and appliances, packing boxes of chemical products, and raw materials of color plate substrate, welded
pipe, steel window and cold-formed section steel in the metallurgical industry have broad application prospects.
The price of Al Zn alloy coated steel sheet is higher than that of common hot-dip galvanized sheet. However, due to the small proportion
of metal aluminum to zinc, the proportion of aluminum zinc alloy coating is only 3.75kg/dm3, while the proportion of zinc is 7.1kg/dm3. Therefore, the thickness of aluminum zinc alloy coating with 150g / m2 (double-sided) coating weight is equal to that
of 275g / m2 (double-sided) hot-dip galvanized steel plate, which greatly saves the plating with higher price Layer metal.
Super corrosion resistance: the corrosion resistance of the product is 6-8 times of that of the general galvanized sheet,
which can ensure 20 years of no rust in various environments;
High temperature oxidation resistance: no discoloration or deformation occurs at 315 ℃;
High thermal reflectance: the thermal reflectance of the product is higher than 75%, which
is twice of that of galvanized sheet;
Easy processing: it can meet the requirements of stamping, shearing, bending and other processing;
Beautiful ppearance: silver white snowflake pattern, beautiful and beautiful, can be directly used without
Surface spraying: it is a good base material for paint coating. The composite coating of alloy and organic matter can provide more effective protection and prevent corrosion under the organic coating.