作为钢厂生产集中地的华北地区，坐拥河北、天津两大钢铁生产大省，一直以来都备受钢铁人士关注。同样，华北地区也是镀锌板卷的生产集中地，国营大厂有首钢、唐钢、邯钢等，民营镀锌钢厂有兆建、新宇、东恒、万利、日鑫等。各大国营民营亦在纷纷细化产品，延伸产品线，镀锌板卷蛋糕争抢愈演愈烈。

As the concentration of steel mill production in north China, with Hebei, Tianjin, two major steel production provinces, has been the attention of steel people.Similarly, north China is also the production of galvanized coil, state-owned factories have Shougang, Tangshan steel, Handan, steel, private galvanized steel mills zhaojian, Xinyu, Zhongheng, Wanli, Rixin, etc.Major state-owned private enterprises are also refining products, extending the product line, galvanized plate roll cake competition is becoming increasingly fierce.

影响锌镀层厚度的因素主要有：基体金属成分、钢材的表面粗糙度、钢材中的活性元素硅和磷含量及分布状态、钢材的内应力、工件几何尺寸、热浸镀锌工艺。现行的国际和中国热镀锌标准都根据钢材厚度划分区段，锌镀层平局厚度以及局部厚度应达到相应厚度，以确定锌镀层的防腐蚀性能。钢材厚度不同的工件，达成热平衡和锌铁交换平衡所需的时间不同，形成的镀层厚度也不同。标准中的镀层平均厚度是基于上述镀锌机理的工业生产经验值，局部厚度是考虑到锌镀层厚度分布的不均匀性以及对镀层防腐蚀性要求所需要的经验值。因此，ISO标准、美国ASTM标准、日本JIS标准和中国标准在锌镀层厚度要求上略有不同，大同小异。

The main factors affecting the thickness of zinc coating include: matrix metal composition, surface roughness of steel, content and distribution of active element silicon and phosphorus in steel, internal stress of steel, geometric size of workpiece, hot dip galvanizing process.The current international and Chinese hot dip galvanizing standards are divided according to the steel thickness. The partial thickness and partial thickness should reach the corresponding thickness to determine the corrosion prevention properties of the zinc coating.Workpiece with different steel thickness, the time required to achieve thermal balance and zinc-iron exchange balance is different, and the coating thickness formed is also different.The average coating thickness in the standard is based on the industrial production experience value of the above galvanizing mechanism, and the local thickness is the experience value required for considering the uneven distribution of the zinc coating thickness and the corrosion protection requirements of the coating.Therefore, the ISO standard, American ASTM standard, Japanese JIS standard and Chinese standard in the slightly different zinc coating thickness requirements, much the same.

热镀锌镀层的厚度决定了镀件的防腐蚀性能。客户可以选择高于或低于标准的锌镀层厚度。对于表面光滑的3mm以下薄钢板，工业生产中得到较厚的镀层是困难的，另外，与钢材厚度不相称的锌镀层厚度会影响镀层与基材的结合力以及镀层外观质量。过厚的镀层会造成镀层外观粗糙，易剥落，镀件经不起搬运和安装过程中的碰撞。钢材中如果存在较多的活性元素硅和磷，工业生产中得到较薄的镀层也十分困难，这是由于钢中的硅含量影响锌铁间的合金层生长方式，会使锌铁合金层迅速生长并将推向镀层表面，致使镀层表面粗糙无光，形成附着力差的灰暗镀层。

The thickness of hot galvanized coating determines the corrosion resistance of the coating.Customers can choose a zinc coating thickness above or below the standard.For smooth thin steel plates below 3mm, it is difficult to obtain a thick coating in industrial production. In addition, the zinc coating thickness, which is not commensurate with the thickness of the steel, will affect the binding force of the coating and the substrate and the appearance quality of the coating.Too thick coating will cause the coating to have a rough appearance, easy to peel off, and the plating parts can not stand the collision of handling and installation process.If there are more active elements in steel silicon and phosphorus, industrial production of thin coating is also very difficult, this is because the silicon content in steel affects the alloy layer between zinc iron growth, will make the zinc iron alloy layer rapid rapidly and will push to the coating surface, the coating surface rough without light, forming adhesion poor gray coating.