Galvanisation of Iron

Galvanisation is a process of coating iron or steel with a layer of zinc to protect it from rusting. The process is named after the Italian scientist Luigi Galvani, who discovered the electrochemical process of corrosion.

Why Zinc?

Zinc is the ideal metal for galvanisation because it is highly resistant to corrosion. When zinc is exposed to air, it forms a thin layer of zinc oxide on its surface, which acts as a barrier against further corrosion. This property makes zinc an excellent material for protecting iron and steel from rust.

The Process of Galvanisation

The process of galvanisation involves the following steps:

1. Cleaning: The surface of the iron or steel is cleaned to remove any dirt, oil or grease.

2. Pickling: The surface is then treated with an acid solution to remove any rust or mill scale.

3. Fluxing: The surface is coated with a flux solution to prevent oxidation during the galvanising process.

4. Galvanising: The iron or steel is dipped into a bath of molten zinc, which bonds with the surface to form a protective layer.

5. Quenching: The coated material is then quenched in water to cool it down and solidify the zinc coating.

Advantages of Galvanisation

Galvanisation has several advantages, such as:

1. Protection against rust: The zinc coating provides excellent protection against rust and corrosion.

2. Longevity: Galvanised materials have a longer lifespan than untreated materials.

3. Low maintenance: Galvanised materials require less maintenance than untreated materials.

4. Cost-effective: Galvanisation is a cost-effective way to protect iron and steel from rust.

Conclusion

In conclusion, galvanisation is a process of coating iron or steel with a layer of zinc to protect it from rusting. Zinc is the ideal metal for galvanisation because it is highly resistant to corrosion. The process involves cleaning, pickling, fluxing, galvanising and quenching. Galvanisation has several advantages, such as protection against rust, longevity, low maintenance and cost-effectiveness.

Option c is correct ....it is the process of coating iron with zinc...

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