喷锌保护是通过一套专用设备将锌丝熔融喷射到钢结构表面上，成为镀锌层。这个镀锌层对钢铁具有双重的保护作用，一方面能像涂料一样起到覆盖保护作用，将钢铁基体与水和空气隔离开。另一方面，当镀锌层有空隙或局部镀锌层遭到破坏而使水与钢铁接触时，镀锌层与钢铁基体之间就会形成腐蚀电池。
Zinc spraying protection is a set of special equipment to melt and spray zinc wire onto the surface of steel structure to form zinc coating. This zinc coating has a dual protective effect on steel. On the one hand, it can act as a coating to protect the steel substrate from water and air. On the other hand, when there is a gap in the zinc coating or the local zinc coating is damaged, which makes water contact with steel, a corrosion cell will be formed between the zinc coating and the steel substrate.