is Galvanized Steel Good for Outdoors?

Galvanized Door

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

For general outdoor use: galvanized steel g30 (30 ounces per square foot).

For use in wet, non-corrosive environments: galvanized steel g60 (60 oz. per sq. ft.).

For use in more corrosive environments: galvanized steel g90 (90 oz. per sq. ft.).

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.

Cost: Galvanized steel is cost-effective.

Workability: Galvanized steel is easier to weld, bend, press, and cut.

Durability: Galvalume steel is more durable in harsh environments.

Corrosion resistance: Galvalume steel has superior corrosion resistance.

Lifespan: Galvalume steel has four times the lifespan of galvanized steel.

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.

White PPGI

Stainless Steel

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!

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