铝锌镀层不能使用在畜牧业中的原因

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畜舍（圈养房屋）内部为高度腐蚀性环境。它不仅湿度高，而且使用各种腐蚀强度的消毒剂。此外，细菌会将牛、猪或家禽的粪便分解成胺和酸，其中胺是铝锌涂层加速腐蚀的重要原因之一。

由于涂层中存在铝，生成的氧化铝膜具有很好的耐酸性，可以隔离酸性腐蚀气氛，但粪便中分解的胺对其具有很强的腐蚀性。
当在涂层中起隔离作用的铝逐渐消耗时，起到牺牲保护作用的锌暴露在腐蚀性大气中并继续起到牺牲保护作用（通过优先腐蚀自身来保护钢板）。
由于铝锌涂层的主要成分是铝（55%的铝），锌含量低于45%（以及少量其他元素），这意味着90克/平方米铝锌产品中锌的比例可能低于40克/平方米。
单面40g/m2镀锌通常用于涂层较厚且腐蚀条件较轻的后续应用，如汽车（漆膜80~120）μm）、家用电器等。在畜牧业温室中，这少量的锌很快被腐蚀性大气消耗。在后续处理中，基底暴露，很快穿孔和腐烂边缘。

The interior of animal husbandry shed (captive building) is a highly corrosive environment. It not only has high humidity, but also uses disinfectants with various corrosive intensities. In addition, bacteria will decompose the feces of cattle, pigs or poultry into amines and acids, among which amines are one of the important reasons for the accelerated corrosion of aluminum zinc coating.

Due to the existence of aluminum in the coating, the generated alumina film has very good acid resistance and can isolate the acidic corrosion atmosphere, but the amines decomposed from feces have very strong corrosion to it.
When the aluminum that plays the role of partition in the coating is gradually consumed, the zinc that plays the role of sacrificial protection is exposed to the corrosive atmosphere and continues to play the sacrificial protection (protect the steel plate by preferentially corroding itself).
As the main component of aluminum zinc coating is aluminum (55% aluminum), zinc is less than 45% (and a small amount of other elements), which means that the proportion of zinc in 90g / m2 aluminum zinc products may be less than 40g / m2.
Single side 40g / m2 zinc plating is usually used in subsequent applications with thicker coating and less severe corrosion conditions, such as automobile (paint film 80 ~ 120) μ m) , household appliances, etc. In the animal husbandry greenhouse, this small amount of zinc is quickly consumed by the corrosive atmosphere. In the follow-up, the substrate is exposed, and soon perforated and rotten edges.