Advantages And Disadvantages of Galvanized Steel

There are many methods of galvanization, but each has something in common: they coat the metal in a zinc coating that prevents the metal underneath from rusting, thus increasing its lifespan. While construction workers and engineers use this useful material in a slew of projects and applications, it’s not for every application. There are some advantages and disadvantages to galvanized steel you should be aware of before using this material in your next project.
The Advantages of Galvanized Steel

The zinc coating in galvanized steel acts as a shield, protecting the steel underneath from elements that may rust the material, such as water and oxygen. It also defends against other contaminants that corrode the metal, including salt and acidic soil. This protection prolongs the durability and longevity of the steel, and even galvanized steel that experiences exposure to moist environments can last up to 20 years. Conversely, well-maintained galvanized steel in a more dry, ideal environment can last up to 50 years.

Plus, galvanized steel is incredibly easy to inspect and maintain. You don’t need any expensive or specialized equipment to check the thickness of the coating. A simple visual inspection is all that’s needed to pinpoint any thin spots. All you need to do to maintain galvanized steel is wash it with an alkaline-based cleaner once a year.

The Disadvantages of Galvanized Steel

The main disadvantage of galvanized steel is the cost. The method of galvanization is what adds to the overall price point, and the most popular galvanization method is hot-dipping. Other methods, such as sealants and paints, are cheaper but less effective. In the end, galvanized steel is better suited for larger, long-term projects. Short-term structures can benefit from a cheaper alternative instead.

Zinc can also be incredibly toxic. The galvanization and welding process both require professionals to wear strict PPE and avoid inhaling or ingesting zinc. The process can also release toxins over time, so if your application requires adherence to eco-friendly standards, this may not be the best material for you.

Is Galvanized Steel Right for Your Project?

For many projects, the advantages of galvanized steel far outweigh the disadvantages, which is why projects that need to withstand the test of time and avoid rust and corrosion implement it. You’ll see galvanized steel in nuts, bolts, benches, ladders, and even buildings. For example, a galvanized steel frame is one of the main components of industrial fabric structures, allowing these structures to withstand a myriad of environments and weather conditions.

Whether galvanized steel is right for your projects depends on the size of your project, the environment, and climate, and how long you need the structure to last. You may have to do an extensive cost-benefit analysis, but if the pros outweigh the cons, you can use galvanized steel to make a durable structure that will last decades.