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镀铝锌板的表面镀层是由55%的铝，43.5%的锌和少量的其它元素构成，在微观下镀铝锌涂层表面为蜂窝结构，由铝构成的“蜂巢”内包容着锌，

在这种情况下，镀铝锌涂层虽然也起着阳极保护的作用，

但一方面由于锌含量的减少一方面由于锌材料由铝包裹不易电解因此阳极保护的作用大大减少，因此一旦镀铝锌板被切开，

在切断的边缘基本丧失被保护的情况下很快就会锈蚀，所以镀铝锌板应当尽量少切割，一旦切割后应用防锈漆或富锌漆保护边缘，

才能够使板材的使用寿命延长。镀铝锌合金（以及其它合金）钢板是在镀锌钢板后出现的一种耐腐蚀性能更好的镀层钢板。

镀55%铝锌钢板的铝锌合金结构是由55%铝、43.4%锌与1.6%硅在600℃高温下固化而组成，形成致密的铝、铁、硅、锌四元结晶体，

此结晶体在钢板表面形成一层坚固的屏障，因而能够有效的防止腐蚀的产生。

The surface coating of galvanized sheet is made of 55% aluminium, Of 43.5% of zinc and a small number of other elements,

The aluminum zinc coating surface is a honeycomb structure, The "hive" made of aluminum contains zinc, under these circumstances,

Although the aluminum-coated galvanized coating also acts as an anodic protection, However, on the one hand, because of the reduction of zinc content,

on the other hand, because zinc material is not easy to electrolysis by aluminum, the effect of anode protection is greatly reduced, Thus, once the aluminous galvanized plate is cut through, In the protection of the basic loss of protection, So the aluminum-coated galvanized sheet should be cut as little as possible,

Once cutting, apply rust proof or zinc rich paint to protect the edges, Can make the service life of the plate is extended.

Aluminized zinc alloy (and other alloy) steel plate is a better corrosion resistance of the coated steel plate appeared after the galvanized steel plate.

The aluminum-zinc alloy structure coated with 55% aluminum-zinc steel plate is composed of 55% aluminum,

43.4% zinc and 1.6% silicon cured at a high temperature of 600℃, forming a dense aluminum, iron, silicon and zinc quadruple crystal,

which forms a solid barrier on the surface of the steel plate, and thus can effectively prevent corrosion.