热镀锌是化学处理，属于电化学反应。冷镀锌是物理处理，只是在表面刷一层锌，导致锌层易脱落。冷镀锌防腐蚀性能比热镀锌差很多。
Hot dip galvanizing is a chemical treatment and belongs to electrochemical reaction. Cold galvanizing is a physical treatment, only brushing a layer of zinc on the surface, resulting in zinc layer easy to fall off. The corrosion resistance of cold galvanizing is much worse than that of hot galvanizing.
经过热镀锌锌加工的产品，在经过热镀锌处理后，锌层与空气接触，会在表面生成一层致密的保护层，把金属和外界隔离，因此达到了防腐的目的，如果锌层不被破坏，格栅板产品可用多达几十年，根据产品的使用环境不同，使用寿命也有所不同。
Hot-dip galvanized products, after hot-dip galvanizing treatment, the zinc layer contacts with the air, will form a dense protective layer on the surface, which will isolate the metal from the outside world. Therefore, the purpose of anti-corrosion is achieved. If the zinc layer is not destroyed, the grille products can be used for up to several decades, depending on the use environment of the products. The service life is also different.
格栅板表面处理鉴别小技巧：
Tips for identifying grille surface treatment:
热镀锌是一种物理反应，使铁制品镀上一层锌，因此锌层厚，我们可以使用比较硬的金属物质刮下一些锌渣，而电镀，是一种化学反应，制品表面有少量的锌离子。所以用再硬的东西也刮不下锌层。
Hot-dip galvanizing is a physical reaction, so that iron products are coated with zinc, so zinc layer is thick, we can scrape off some zinc slag with harder metal materials, while electroplating is a chemical reaction, with a small amount of zinc ions on the surface of products. So even the hardest thing can't scrape the zinc layer.
一般专业格栅板生产厂都是采用热镀锌对钢格板进行表面处理，我们建议采用热镀锌处理。
Hot-dip galvanizing is usually used to treat the surface of steel grille in professional grille production plants. We suggest that hot-dip galvanizing be used.