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锌易溶于酸，也能溶于碱，故称它为两性金属。锌在干燥的空气中几乎不发生变化。在潮湿的空气中，锌表面会生成致密的碱式碳酸锌膜。

在含二氧化硫、硫化氢以及海洋性气氛中，锌的耐蚀性较差，尤其在高温高湿的气氛里，锌镀层极易被腐蚀。锌的标准电极电位为-0.76V，

对钢铁基体来说，锌镀层属于阳极性镀层，它主要用于防止钢铁的腐蚀，其防护性能的优劣与镀层厚度关系甚大。锌镀层经钝化处理、

染色或涂覆护光剂后，能提高其防护性和装饰性。

Zinc is easily soluble in acid, but also in alkali, so it is called an amphotropic metal.Zinc changes very little in the dry air.In humid air,

the zinc surface produces a dense alkaline zinc carbonate membrane.In the atmosphere containing sulfur dioxide, hydrogen sulfide and Marine atmosphere,

zinc corrosion resistance is poor, especially in the high temperature and high humidity atmosphere, zinc coating is easy to corrosion.

The standard electrode potential of zinc is-0.76V. For the steel matrix, the zinc coating belongs to the anodic coating,

which is mainly used to prevent the corrosion of steel, and the quality of its protective performance has a lot to do with the coating thickness.

The zinc coating can improve its protective and decorative properties after passivation, staining, or coating with a photoprotective agent.