Use of Galvanized Steel

Definition: Galvanize Definition

Galvanization refers to a process by which steel is covered with a layer of zinc via a chemical process. This ensures that the steel does not get corroded by rust. This process is named after its inventor, an Italian called Luigi Galvani.

Process: Hot Dipped Galvanized Steel

Galvanized steel is prepared for use with a method known as the ‘Hot Dipped Galvanization’ process.

The steel is passed through a bath of molten zinc. The zinc is usually at a temperature of 460 Degrees Celsius or 860 Degrees Fahrenheit.

After this, the steel which as now been coated with zinc is exposed to the atmosphere. Then, the zinc reacts with the oxygen in the atmosphere to form zinc oxide. This then further reacts with the carbon dioxide in the atmosphere to form zinc carbonate. The zinc carbonate forms a dull gray layer on top of the steel which prevents the steel from being exposed to corrosion or rust. Thus the zinc layer has now become a part of the steel. Because of this, the zinc layer is also referred to as the ‘sacrificial anode’ layer.

Forms and Uses of Galvanized Steel

Galvanized steel is available in a variety of forms, such as galvanized pipes and galvanized wire. It is used everywhere.

• Galvanized steel frames are used to build houses.
• Car parts are made out of galvanized steel – the body of trucks and buses are being made of galvanized steel.
• Galvanized metal has found its way into several household appliances such as washing machines, air conditioning housings, hair dryers, etc.
• Galvanized steel is used in high tension electrical towers, protective gears, highway signs etc.
• Galvanized steel is used to make wrought iron gates and other items.
• Galvanized steel is also used to make metal pails.

Thus, galvanized steel has found it way into several applications which are an integral part of our daily life.