Do You Know Galvanizing?

Do You Know Galvanizing?

The galvanizing machine supplier will share this article with you.

Galvanizing is one of the most widely used to methods in metal corrosion protection. It involves applying a thin coating of zinc on a thicker base metal to help protect it from the surrounding environment. Next time you are in the car, take a look at the street signs and lamp posts you pass by. Many of them are dumb and silver color on them. That "silver" is actually the outer coating of zinc.

Why galvanize?

Very simple, galvanize the metal to make it corrosion resistant. Without a protective zinc layer, the metal is still exposed to the element and may oxidize and corrode more quickly. Galvanized steel is a cost-effective alternative material, such as austenitic stainless steel or aluminum in order to prevent corrosion.

How does it work?

There are many ways that galvanizing can protect metals. First, it creates a protective coating to protect the metal from the surrounding environment. The zinc layer prevents moisture and other elements in the air from corroding the steel below. If the zinc layer is scratched deep enough, the metal will be exposed and susceptible to corrosion.

Galvanizing can also protect metals through a process called "galvanic corrosion". When two metals with different electrochemical compositions come into contact with each other in the presence of an electrolyte (such as salt water), galvanic corrosion occurs. According to the atomic structure of these two metals, one metal is the anode and the other is the cathode. The corrosion rate of the anode is faster than itself, and the corrosion rate of the cathode is slower than itself. The reason why zinc is used for galvanizing is that it has an affinity to become an anode when it comes into contact with many different types of metals. Since the zinc coating in contact with the base metal is usually the anode, it slows the corrosion of the base metal, or the cathode.

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