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By certification 
Main characteristics of galvanized sheet:
Corrosion resistance, painting, formability and spot welding.
It is widely used. It is mainly used for parts requiring good appearance of small household appliances, but its price is more expensive than SECC. Therefore, many manufacturers use SECC to save costs.
Divided by zinc: the size of zinc flower and the thickness of zinc layer can explain the quality of zinc plating. The smaller the thickness, the better. Manufacturers can also add fingerprint resistant treatment. In addition, it can be distinguished by its coating. For example, Z12 represents the total amount of double-sided coating 120g / mm.
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