ASTM A653 G90 Dx51d Z275 Z350 Hot Dipped Galvanized Steel Coil Galvalume Steel Coil Aluzinc Az150 Steel Galvanized Sheet Strip Hdgi Coil

What are the main types of passivation films?
A: They are chromate passivation and chromium-free passivation (such as silane passivation and titanate passivation).
Does the base material of the galvanized coil affect its performance?
A: Yes, common base materials include Q235 and SPCC. The higher the base material strength, the better the overall mechanical properties of the galvanized coil.
What is the special treatment for fingerprint-resistant galvanized coil?
A: An additional fingerprint-resistant coating is applied to the surface of the passivation layer to improve stain resistance and wear resistance.
What is the typical yield strength range for galvanized coil?
A: Standard grades range from 235-355 MPa, while high-strength grades can reach 420-700 MPa.
What are the differences in service life associated with different zinc coating thicknesses?
A: The thicker the zinc coating, the longer its lifespan. A zinc coating of 80g/㎡ can last 5-8 years outdoors, while a zinc coating of 275g/㎡ or above can last 15-20 years.