Within many steel projects, it’s vital for your metal to be protected from the risk of corrosion. One of the most popular methods for doing this is called galvanizing, which is a process that involves applying a thin coating of zinc to metal to help shield it from the surrounding environment.
At Wasatch Steel, we can help with the sorts of metals that are best for galvanizing along with the processes you need to get it done. Here are some of the basics you need to know.
As you drive around in your car, take note of things like street signs and lamp posts – a high percentage of these will have a mute, silver color. This silver is actually zinc coating, and this metal has been galvanized. This means its thicker metal base has been coated with zinc to help protect it from the rigors of that environment.
Galvanizing steel gives it anti-corrosion properties. Without this coating, it would be exposed to the elements, allowing it to oxidize and corrode much faster. Galvanized steel is often a more cost-effective alternative to using austenitic stainless steel or aluminum to avoid corrosion.
Galvanizing protects metal in more than one way. For starters, it creates a protective coating that prevents corrosion. In addition, it can also protect metal through “galvanic corrosion,” a process where two metals of a different makeup are placed into contact with one another with an electrolyte (such as salt water) present.
One metal becomes the anode, and the other becomes the cathode. The anode corrodes more rapidly than it would normally, while the cathode does so more slowly. Zinc has an affinity toward being the anode when it contacts many metals, meaning it can slow the corrosion of the base metal, or cathode. That’s why zinc is so often used in galvanizing.
There are a few methods for galvanizing metal:
For more on galvanizing steel, or to learn about any of our steel services, speak to the pros at Wasatch Steel today.