与镀锌板相比，镀铝锌板有什么优势？

What are the advantages of aluminum-galvanized plates over galvanized plates?

钢铁的活泼性不如铝、锌，所以，在钢板表面镀上铝锌，当然是铝和锌先被氧化；然后产生的氧化铝、氧化锌会在钢铁表层形成致密的保护膜，保护内层的钢板不被腐蚀。所以，镀铝锌/镀锌的量保证了钢板表面的抗腐蚀性能。

The vitality of steel is not as lively as aluminum, zinc, so, plating aluminum and zinc on the surface of the steel plate, of course, aluminum and zinc are oxidized first; then the aluminum oxide, zinc oxide will form a dense protective film in the steel surface, to protect the inner steel plate from corrosion.Therefore, the amount of aluminum galvanizing / galvanization ensures the corrosion resistance of the steel plate surface.

镀铝锌钢板（GALVALUME/GL）是目前具有最佳抗腐蚀性能的金属镀层配比的钢板。镀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，其整个结构由铝－铁－硅－锌，形成致密的四元结晶体，从而形成一层强有效防止腐蚀因子透穿的屏障。锌的物理性质开朗，在常温状态的气体中，表层转化成一层层薄而高密度的碱式碳酸锌膜，可阻拦深化空气氧化，而铝在气体中，可产生不能溶解的化合物层，之中起天然屏障维护作用。

Galvanized steel plate (GALVALUME / GL) is a metal plating ratio with the best corrosion resistance.The aluminum-zinc alloy structure of aluminum galvanized steel plate is composed of 55% aluminum, 43.4% zinc and 1.6% silicon curing at a high temperature of 600℃. The whole structure consists of aluminum-iron-silicon-zinc, forming a dense four-element crystalline body, thus forming a strong barrier against the penetration of corrosion factors.The physical nature of zinc is cheerful. In the room temperature gas, the surface layer is transformed into a layer of thin and high-density alkali zinc carbonate film, which can block the deepening of air oxidation, while aluminum can produce an insoluble compound layer, which plays a natural barrier maintenance role.

普通热镀锌产品通常使用温度不超过230℃，250℃时会变色，而镀铝锌板可在315℃环境下长期使用不变色。 耐热钝化处理的镀铝锌钢板，在300℃环境下120小时，其颜色变化较铝板和镀铝板的变化均小。

Ordinary hot galvanized products usually use at a temperature not exceeding 230℃ and change color at 250℃, while aluminized galvanized plates can be used for long periods at 315℃.Aluminized galvanized plates resistant to heat passivation were less for 120 hours at 300℃.