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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。

因為55%AL-Zn的密度比Zn的密度小,所以在重量相同和鍍金層厚度相同的情況下,鍍鋁鋅鋼板比鍍鋅鋼板的面積大3%以上。鍍鋁鋅由于力學(xué)性能的增

加，內(nèi)層基材表面鍍層密度較好，含錳量相對高，因此鍍鋁鋅在普通焊接條件下無法焊接，只能通過鉚釘?shù)绕渌竭B接。在焊接方面熱鍍鋅鋼板表

現(xiàn)較好。

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. Because the density of 55%AL-Zn is less than that of Zn, the area of aluminum-plated zinc sheet is more than 3% larger with the same weight

and the same gold plating thickness. Due to the increase of mechanical properties of aluminized zinc, the surface coating density of the inner substrate is

good, and the manganese content is relatively high, so the aluminized zinc can not be welded under ordinary welding conditions, and can only be connected

by rivets and other parties. In welding, hot-dip galvanized steel plate performance is better.