1. Surface state: galvanized coil due to different treatment methods in the plating process, the surface state is also different, such as ordinary zinc flower, fine zinc flower, flat zinc flower, no zinc flower and phosphating treatment of the surface. The German standard also provides for surface grades.

2 galvanized coil should have a good appearance, no harmful defects to the use of the product, such as no plating, holes, rupture and scum, more than plating thickness, scratch, chromic acid dirt, white rust, etc. Foreign standards are not very clear on the specific appearance defects. When ordering, the specific defects should be specified in the contract.