Hot Dipped SGCC SGCC PPGI Coil Dx51d+Z Dx52D+Z Dx53D+Z Gi Cold Rolled Steel Coil

How is the surface roughness of galvanized coil controlled?
A: By adjusting the annealing process parameters and the pressure of the post-galvanizing skin-pass treatment.
What improvements have been made to environmentally friendly galvanizing processes?
A: Technologies such as chromium-free passivation agents, pickling wastewater recycling, and zinc slag recycling are used.
What are the core performance indicators of galvanized coil?
A: These include zinc layer thickness, adhesion, corrosion resistance, surface finish, and dimensional accuracy.
What is the commonly used unit for zinc layer thickness?
A: The international standard is g/m2 (total weight on both sides). Hot-dip galvanizing typically ranges from 80-600 g/m2, while electroplating typically ranges from 10-50 g/m2.
What types of galvanized coil are categorized by surface condition?
A: They can be classified into standard spangle, small spangle, no spangle, and skin-pass spangle.