What is the main purpose of galvanization in metal fabrication?

The main purpose of galvanization in metal fabrication is to protect steel from corrosion. This process involves coating steel or iron with a layer of zinc, which serves as a barrier against moisture and other corrosive elements that can lead to rust. Zinc has a higher electrochemical potential than iron, meaning it will corrode preferentially when exposed to the same environment, thus sacrificing itself to protect the underlying steel. This protective coating significantly extends the lifespan of metal structures and products, making galvanization an essential practice in construction, automotive, and various other industries where metal components are exposed to harsh conditions.

While improving aesthetic appearance, enhancing electrical conductivity, and increasing the weight of the metal might be considerations in specific situations, they are not the primary objectives of the galvanization process in metal fabrication. The focus remains clearly on corrosion resistance, ensuring metal products maintain their integrity and usability over time.