A galvanized coil is a thin steel plate that is immersed in a molten zinc bath so that a layer of zinc adheres to the surface. It is mainly produced by the continuous galvanizing process, that is, the rolled steel plate is continuously immersed in a plating bath containing molten zinc to make a galvanized steel plate; an alloyed galvanized steel plate. This kind of steel plate is also made by the hot dip method, but it is heated to about 500°C immediately after coming out of the tank to form an alloy film of zinc and iron. This kind of galvanized coil has good paint adhesion and weldability.
dx51d galvanized coil
Galvanized coils also have defects. Today, Li Cheung Steel will introduce to you 18 defects in galvanized coils: 1. The galvanized zinc layer falls off,
2. scratch,
3. Passivation spots,
4. Zinc granules,
5. Thick edges,
6. galvanized Coil packaging
7. Air knife streaks,
8. Air knife scratches,
9. exposed steel,
10. Mixed,
11. Mechanical damage,
12. Poor performance of steel base,
13.Langbian,
14. Piao song,
15. Inappropriate size,
16. Imprinting,
17. The thickness of the zinc layer is inconsistent,
18. Roller printing, etc.
