Because the steel plate will be affected by moisture oxidation rust, it must be added on the surface of the anti-corrosion protective layer, the general use of anti-corrosion coating is divided into hot dip galvanized Zn and hot dip aluminum zinc alloy Al-Zn (aluminum zinc alloy composition of 55% aluminum, zinc 43.5% and silicon 1.5%, referred to as 55%Al-Zn). The data show that the comprehensive anti-corrosion ability of 55% aluminum zinc plating is 4 times that of the same thickness galvanized.
The surface of the aluminized zinc plate is characterized by smooth, flat and gorgeous star flowers, and the primary color is silver-white. The special coating structure makes it have excellent corrosion resistance. The normal service life of aluminized zinc plate can reach 25a, the heat resistance is very good, can be used in 315℃ high temperature environment; The adhesion between the coating and the paint film is good, and it has good processing properties, which can be pressed, cut, welding, etc. The surface conductivity is very good.
The composition of the coating is composed of 55% aluminum, 43.4% zinc and 1.6% silicon by weight ratio. The production process of aluminum-zinc plated steel plate is similar to that of galvanized steel plate and aluminum-plated plate in that it is a continuous melting plating process. The aluminum plated zinc steel plate with 55% aluminum zinc alloy coating has better corrosion resistance than the galvanized steel plate with the same thickness when both sides are exposed to the same environment. The aluminum plated zinc steel plate with 55% aluminum zinc alloy coating not only has good corrosion resistance, but also has excellent adhesion and flexibility.
