镀锌是在钢或铁上涂上一层保护性锌层，以防止生锈的过程。常见的方法是热浸镀锌，即把部件浸入熔融的热锌浴中，从而实现镀锌的效果。
Galvanizing is the process of coating a protective layer of zinc on steel or iron to prevent rusting. The common method is hot-dip galvanizing, that is, immersing the parts in the molten hot galvanizing bath, so as to achieve the effect of galvanizing.
虽然镀锌会控制底层钢的腐蚀，但在几十年的气候暴露后，生锈是不可避免的，尤其是如果暴露在酸性条件下。例如，尽管有锌涂层的保护作用，波纹铁皮屋顶将在几年内开始退化。
Although galvanizing will control the corrosion of the underlying steel, rust is inevitable after decades of climate exposure, especially if exposed to acid conditions. Corrugated sheet iron roofs, for example, will begin to degrade in a few years, despite the protective effect of zinc coating.
海洋和含盐环境也降低了镀锌铁的寿命，因为海水的高电导率增加了腐蚀速率，主要是通过将固体锌转化为可溶的氯化锌，而氯化锌只是被洗掉。镀锌车架就是一个例子；在寒冷的环境中，由于道路上的盐份，它们的腐蚀速度更快，尽管它们比未受保护的钢材更耐用。
Marine and saline environments also reduce the life of galvanized iron, because the high conductivity of seawater increases the corrosion rate, mainly by converting solid zinc into soluble zinc chloride, which is only washed away. Galvanized frame is an example; In cold environments, they corrode faster because of the salt on the road, although they are more durable than unprotected steel.
济南通风管道加工
Jinan ventilation pipe processing
如果保持其他补充措施，如油漆涂层和额外的牺牲阳极，镀锌钢可以使用几十年。在无盐环境中的腐蚀速度主要是由空气中的二氧化硫含量引起的。
Galvanized steel can be used for decades if other complementary measures such as paint coating and additional sacrificial anodes are maintained. The corrosion rate in salt free environment is mainly caused by the content of sulfur dioxide in the air.
通风管道镀锌或者卷板镀锌是非常常见的用途，全世界每年镀锌数十万吨钢产品。济南通风管道加工发现在发达，大多数较大的城市都有几个镀锌厂，许多钢铁制造项目都是为了保护而镀锌的。通常包括：街道家具、建筑框架、阳台、阳台、楼梯、梯子、走道等等。热浸镀锌钢也用于制造钢架，作为钢架建筑的基本建筑材料。
Galvanizing of ventilation pipes or coils is a very common use. Hundreds of thousands of tons of steel products are galvanized every year all over the world. Jinan ventilation pipe processing found that in developed countries, most of the larger cities have several galvanizing plants, many steel manufacturing projects are galvanized for protection. Usually include: street furniture, building frame, balcony, balcony, stairs, ladder, aisle, etc. Hot dip galvanized steel is also used in the manufacture of steel frame, as the basic building material of steel frame construction.
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