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鍍鋁鋅是鍍鋅防腐2-6倍，鍍鋁鋅龍骨長(zhǎng)期祼露表面沒(méi)有顏色變化，如遇化學(xué)物質(zhì)腐蝕，表面發(fā)生物理反應(yīng)，在龍骨表面形成鋁保護(hù)膜，

使外界化學(xué)物質(zhì)與龍骨分離隔開(kāi)，保護(hù)龍骨主體材料，防止生銹。“鍍鋁鋅鋼卷”的耐腐蝕性來(lái)自鋁的障礙層保護(hù)功能，和鋅的犧牲性保護(hù)功能。

當(dāng)鋅在切邊、刮痕及鍍層擦傷部分作犧牲保護(hù)時(shí)，鋁便形成不能溶解的氧化物層，發(fā)揮屏障保護(hù)功能。鍍鋁鋅合金鋼卷已在各種不同的大氣環(huán)境中，

進(jìn)行了20多年的室外曝露試驗(yàn)，證實(shí)鍍鋁鋅鋼板的切邊保護(hù)功能，比鍍鋅鋼板好很多。

Aluminized zinc is galvanized corrosion 2-6 times, galvanized zinc keel long-term bare surface no color change, such as chemical corrosion,

surface physical reaction, aluminum protective film on the surface of the keel, so that the external chemicals and keel separated,

protect the main material of the keel, prevent rust.The corrosion resistance of "galvanized steel roll"

comes from the barrier layer protection function of aluminum and the sacrificial protection function of zinc.

When zinc is used for sacrificial protection in edge cutting, scratches and coating bruises,

aluminum will form an insoluble oxide layer and play a barrier protection function.

Aluminized galvanized alloy steel coil has been in a variety of different atmospheric environment, more than 20 years of outdoor exposure test,

confirmed that the edge protection function of aluminum galvanized steel sheet, much better than galvanized steel plate.