The
aluminum-zinc plate manufacturer's aluminum-zinc plate is composed of aluminum-zinc alloy structure, which is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at a high temperature of 600 ° C. The whole structure is composed of aluminum-iron-silicon-zinc , an alloy that forms dense quaternary crystals.
Since the steel plate will be oxidized and rusted when it is wet, it is necessary to add an anti-corrosion protective layer on the surface. , zinc 43.5% and silicon 1.5%, referred to as 55% Al-Zn). According to the data, the comprehensive anti-corrosion ability of 55% galvanized zinc is 4 times that of galvanized with the same thickness.
According to foreign experience and specifications, the anti-corrosion coating of the base material of general profiled steel plate (pit plate) should not be less than hot-dip galvanized 350g/㎡ (Z35) or hot-dip galvanized 185 g/㎡ (AZ185) as the building structure cooling The Zinc/Galvanizing specification of the low-hot-dip galvanized layer of rolled steel and floor slab is 275 g/㎡ (Z27), and the requirement for coastal exposed parts is 350 g/㎡ (Z35).
Features:
Corrosion resistance: Zinc has active chemical properties. In the air at room temperature, a thin and dense basic zinc carbonate film is formed on the surface, which can prevent further oxidation, while aluminum can form an insoluble oxide layer in the air. It acts as a barrier protection in it.
Heat resistance: Galvanized sheet can be used in high temperature environment up to 315 degrees.
Reflectivity: Galvanized sheet has high reflectivity, its heat reflectivity is almost twice that of galvanized steel, it is very suitable for steel structure metal roof, and can achieve energy saving effect.
Easy to paint: The galvanized sheet has excellent adhesion between the galvanized sheet and the paint, and can be painted without pretreatment and weathering.
The coating adhesion of the gold-plated layer of the galvanized sheet is relatively good, so it can also be directly coated on advertising boards and general-purpose sheets without pre-treatment such as Weathering.
