Galvanlume Steel Coil

Galvalume steel coils, also known as Aluzinc steel coils, are a type of coated steel product that combines the corrosion resistance of aluminum with the galvanic protection of zinc. The term “Galvalume” is a registered trademark owned by BIEC International Inc., and it refers specifically to their product.

Galvalume steel is made by coating a steel substrate with a mixture of aluminum, zinc, and silicon. The coating is applied through a continuous hot-dip process, where the steel coil is immersed in a molten bath of the coating material. The coating composition typically consists of approximately 55% aluminum, 43.5% zinc, and 1.5% silicon.

The combination of aluminum and zinc offers excellent corrosion resistance, as both metals have inherent protective properties. The aluminum provides a self-healing mechanism, forming a thin, transparent oxide layer that prevents further corrosion, while the zinc acts as a sacrificial anode, protecting the underlying steel from rust.

Galvalume steel coils are widely used in the construction industry for roofing, cladding, and other applications requiring corrosion-resistant and durable materials. They offer a longer lifespan compared to traditional galvanized steel and are known for their superior resistance to atmospheric corrosion, heat, and sunlight exposure.