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锌的化学性质活泼，在常温下的空气中，表面生成一层薄而致密的碱式碳酸锌膜，可阻止进一步氧化，而铝在空气中，可形成不能溶解的氧化物

层，在其中起屏障保护功能；试验在同等厚度、镀层、表面处理方式的热镀锌钢板与镀铝锌钢板的前提下。镀铝锌比热镀锌有优异的耐腐蚀性。普

通热镀锌产品通常使用温度不超过230度，250度是会变色，而镀铝锌板可在315度的环境下长期使用不变色。镀铝锌钢板的力学性能主要表现在屈

服强度、抗拉强度，伸长率。普通DC51D牌号150克/平方的镀锌钢板，一般屈服强度在140-300mpa之间,抗拉强度在200-330之间，伸长率在13-25之

间。而牌号DC51D+AZ镀铝锌150克/平方的镀铝锌钢板屈服强度在230-400mpa之间，抗拉强度在230-550之间，伸长轨在15-45之间。

The chemical nature of zinc is active, in air at room temperature, a thin and dense alkaline zinc carbonate film is formed on the surface, which can prevent

further oxidation, while aluminum can form insoluble oxide layer in air, in which is the barrier protection function; under the premise of hot-dip galvanized

steel plate and aluminum zinc steel plate of the same thickness, plating and surface treatment. Aluminized zinc has excellent corrosion resistance over hot

dip galvanizing. Ordinary hot-dip galvanized products usually use the temperature is not more than 230 degrees, 250 degrees will change color, and

aluminized zinc plate can be used in 315 degrees of environment for a long time does not change color. The mechanical properties of the steel sheet are

mainly in yield strength, tensile strength and elongation. Galvanized steel plate with ordinary DC 151 D brand 150 g / square, generally yield strength

between140-300mpa, tensile strength between 200 and 330, and elongation between 13 and 25. DC51D + AZ 150 g / square zinc coated steel plate has yield

strength between 230-400 mpa, tensile strength between 230-550, and elongation rail between 15-45.