The surface state of surface state galvanized coil is different because of the different treatment methods in the coating and plating process, such as ordinary zinc flower,fine zinc flower, flat zinc flower, zinc free flower and phosphating surface.
The German standard also provides for surface grades.
Galvanized plate should have a good appearance, shall not have harmful defects to the use of the product, such as no plating, holes,cracks and scum, more than thick plating,abrasion, Chromic aciddirt,white rust,etc.
Foreign standards are not very clear about the specific appearance defects. Some specific defects should be specified in the contract when ordering.
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