Material and galvanization process.

1. Material of the substrate.

– Mainstream: Q235B carbon structural steel. High value for money, excellent performance in welding and drilling, and highly versatile in the market.

– Heavy load/coastal: Q355B low-alloy high-strength steel, with higher yield strength and enhanced wind resistance and compression resistance.

2. Galvanization requirements.

– Process: Hot-Dip Galvanized. Cold-Dip Galvanized is strictly prohibited.

– Zinc layer thickness: average ≥85μm, localized ≥65μm, capable of withstanding intense ultraviolet radiation, high temperatures, humid conditions during rainy seasons, and coastal salt fog.

– Implementation standard: GB/T 13912-2020

– Surface quality: The zinc coating is uniform, silver-colored, and free of gaps, flaking, bulges, or burrs.