The galvalume & aluzinc steel sheet in coil uses the cold-rolled steel sheet as a substrate and is solidified by 55% aluminum, 3.4% zinc, and 1.6% silicon at 600 °C. It combines the physical protection and high durability of aluminum and the electrochemical protection of zinc. It is also called an aluzinc steel coil.

What is the difference between Galvanized steel and Galvalume steel?

The primary difference lies in its coating layer. For the galvanized sheet, a layer of zinc material is averagely distributed on the surface, playing as a positive sheet protective to the base metal; in other words, zinc works as a substitute for corrosive proof protecting the base metal until it is torn off.

While the galvalume sheet's surface is a coating layer consisting of 55% aluminum, 43.5% zinc, and other elements, which appears as a honeycomb structure under microscopic observation. An aluminum honeycomb wraps the zinc. Under such circumstances, even though the galvalume coating also plays its protective role as a positive sheet. However, such protection decrease sharply due to the declining content of zinc and no easy electrolysis when zinc is wrapped in aluminum.

Therefore, once the galvalume sheet is cut open, the cut's verge would generally lose its protector and quickly rust. So we should cut as little as possible; once thinning happens, use anti-rusting or zinc-rich paint to protect the verge, extending its lifespan.

FAQ

Q: How long is the service life?

A: It is 5-8 years for regular zinc coating—more zinc coating, more service life.

Q: When can I get the quotation?

A: We can quote within 30 minutes after the price update on the day. If you urgently want the price, please call us by phone.

Q: What is your regular shipment?

A: Usually, our containers or bulk, according to your requirements.

Q: Can I customize the products?

A: yes, we have many pattern coils; you could choose from our pattern or produce them according to your pictures.

Q: How does the delivery time sound to you?

A: Usually is 7-25 days. Regular size is more quickly.