1) Surface state: The galvanized sheet has different surface states due to different treatment methods in the coating process, such as common zinc flower, fine zinc flower, flat zinc flower, zinc flower-free and phosphatized surface, etc. German standards also stipulate that there are surface grades.
(2) Galvanized products shall have a good appearance, and shall not have defects harmful to product use, such as no plating, holes, cracks, scum, excess plating thickness, scratches, chromic acid dirt, white rust, etc. Foreign standards are not very clear about specific appearance defects. When ordering, some specific defects should be listed in the contract.