Galvanized steel is a premium outdoor construction material! The steel is hot-dipped galvanized to form a dense protective layer that prevents the steel from rusting and is resistant to harsh weather conditions and moisture. Galvanized steel, galvalume steel is used in a wide range of outdoor applications such as roofs, facades, fences, bridges, structures, and more.
How Long Does Galvanized Steel Last Outdoors?
Galvanized steel relies on a zinc coating to prevent corrosion, the thickness of the zinc coating determines the service life, Wanzhi Group mainly produces GI GL steel in the range of 30-350g, and different thicknesses of the zinc coating of galvanized steel in the general, industrial and marine environments, the service life of galvanized steel in general, industrial and marine environments can range from 10 to 50 years.
What is the Recommended Zinc Coating for GI Steel in Different Environments?
The thickness of the zinc coating determines the price of galvanized steel. Choosing the right zinc coating for the project and the environment in which it is to be used reduces costs and allows the steel to perform its function better.
| Use | Recommended |
|---|---|
| Indoor uses | Z10 or Z12 (100 g/㎡or 120 g/㎡) |
| Suburban area | Z20 and painted (200 g/㎡) |
| Urban or industrial area | Z27 (270 g/㎡) or G90 (American Standard) and painted |
| Coastal area | Thicker than Z27 (270 g/㎡) or G90 (American Standard) and painted |
| Stamping or deep drawing applications | Thinner than Z27 (270 g/㎡) or G90 (American Standard) to avoid coating peeling off after stamping |
Is Galvanized or Galvalume Plated for Outdoor Use?
Galvanized steel is steel coated with a pure zinc layer, and aluminized zinc steel is steel coated with a zinc-aluminum alloy. Outdoor construction requires materials with high resistance to weathering, heat, and corrosion. The advantage of galvanized steel in outdoor construction is lower cost, and the advantage of galvalume plated steel is better durability.
Other steel materials for outdoor construction
In addition to galvanized steel and zinc-aluminized steel, there are other metals suitable for outdoor construction, such as PPGI/PPGL, stainless steel, and aluminum. Depending on your budget, the appearance of your project, and the functionality of the steel, you can choose the right metal for you.
Color-coated steel: colorful, decorative, versatile and cost-effective.
Stainless steel: corrosion resistant, easy to maintain.
Aluminum: lightweight and high strength.
Wanzhi Group produces and supplies all kinds of metal steel, PPGI/PPGL/GI/GL/ZAM, Stainless steel, Aluminum, and so on. Contact us for more information and a free quote!