Galvanising

Galvanising is a process of applying a protective zinc coating to steel or iron to prevent corrosion. It is one of the most effective and widely used methods to increase the durability and longevity of metal structures and products exposed to harsh environments.

The galvanising process involves immersing the steel or iron into a bath of molten zinc, which metallurgically reacts with the surface of the metal to form a series of zinc-iron alloy layers. These layers create a long-lasting impenetrable barrier, providing exceptional protection against rust and corrosion.

There are two primary methods of galvanising:

1. Hot-dip galvanising: This is the most common and widely used method (also known as spin galvanising). The steel or iron is first cleaned of any impurities, then dipped into a molten zinc bath at temperatures around 450°C (842°F). The molten zinc bonds with the metal’s surface, forming a thick and uniform coating.
2. Electro-galvanising: In this method, an electric current is used to deposit a layer of zinc onto the surface of the steel or iron. This process is typically used for thinner materials and provides a more controlled and precise coating thickness.

Galvanised steel or iron is widely used in various applications, including construction, the automotive industry, agricultural equipment, electrical towers, fencing and more. It is favoured for its cost-effectiveness, low maintenance requirements, and excellent resistance to rust and corrosion even in harsh outdoor environments or exposure to moisture.