Hot-dip galvanising is the process of coating steel with zinc to help prevent corrosion. This process involves the immersion of the steel in a bath of molten zinc at a temperature of roughly 450°C. The zinc chemically reacts with the metal to form a protective coating which can potentially remain rust-free for over 100 years.

How to achieve the best coating finish possible.

The picture below illustrates the many stages of the galvanising process. The material must be cleaned in multiple different chemical pre-treatment tanks. Due to this, the hollow items must have suitably sized holes in the correct place to allow immersion to happen with no restrictions. All materials must have no paint, sticker residue or any other surface contaminants as they prevent the chemicals from cleaning the steel and stop the zinc bonding with the steel. Clean steel, venting and drainage holes are crucial to the Galvanising process and the quality of the finish you receive.

Galvanizing is mainly used as an industrial coating for corrosion prevention. However, we use Galvanising, as an option, on our gates so that our customers can get the best possible surface finish.

The diagram shows the stages of Galvanizing and how the material is processed through the chemical tanks and zinc bath. Read more about the benefits of galvanising.

Image source American Galvanizers Association

The Galvanising Process