Galvanzied Steel Coil with Zero Spangle for Roofing sheet

Advantages of Galvanized Coils

1.Anti-corrosion performance: The galvanized layer forms a protective film of zinc oxide/zinc carbonate through the principle of preferred corrosion by sacrificial anodes, effectively isolating the steel substrate from contact with corrosive media. When the thickness of the hot-dip galvanized coating is ≥45μm, the corrosion rate under salt spray test is ≤1μm/ year, and the corrosion resistance life is 5 to 10 times longer than that of ordinary steel coils.

2.It has a wide range of application scenarios: it is suitable for fields with high requirements for corrosion resistance, such as building steel structures, home appliance manufacturing (such as refrigerator shells), the automotive industry (chassis anti-corrosion parts), and the energy industry (photovoltaic brackets).

3.Economic benefits: The full life cycle cost of galvanized steel coils is 30-50% lower than that of ordinary steel coils. Although the unit price of materials is about 15-30% higher (for example, Q235 galvanized steel coil is about 4,800 yuan per ton), the cost of anti-corrosion maintenance is significantly saved and the service life is extended by 3-5 times. ‌

4.Stable processing performance: During stamping and bending, the deformation rate should be controlled (such as the bending radius ≥2 times the plate thickness) to prevent local peeling of the coating. Conventional welding processes can meet the requirements without the need for special welding materials. ‌

5.Local peeling of the coating: Conventional welding processes can meet the requirements without the need for special welding materials.