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鋅的化學(xué)性質(zhì)活潑，在常溫下的空氣中，表面生成一層薄而致密的堿式碳酸鋅膜，可阻止進(jìn)一步氧化，而鋁在空氣中，可形成不能溶解的氧化物

層，在其中起屏障保護功能；試驗在同等厚度、鍍層、表面處理方式的熱鍍鋅鋼板與鍍鋁鋅鋼板的前提下。鍍鋁鋅比熱鍍鋅有優(yōu)異的耐腐蝕性。普

通熱鍍鋅產(chǎn)品通常使用溫度不超過230度，250度是會變色，而鍍鋁鋅板可在315度的環(huán)境下長期使用不變色。鍍鋁鋅鋼板的力學(xué)性能主要表現(xiàn)在屈

服強度、抗拉強度，伸長率。普通DC51D牌號150克/平方的鍍鋅鋼板，一般屈服強度在140-300mpa之間,抗拉強度在200-330之間，伸長率在13-25之

間。而牌號DC51D+AZ鍍鋁鋅150克/平方的鍍鋁鋅鋼板屈服強度在230-400mpa之間，抗拉強度在230-550之間，伸長軌在15-45之間。

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.