Category: Chemistry FAQs Subject: Chemistry Chapter: Metallurgy Question: 1
Question 1. What is galvanisation for class 7?
Solution ▪ Galvanisation is the process of coating a metal, typically iron or steel, with a layer of zinc to protect it from corrosion. ▪ The process involves immersing the metal in a bath of molten zinc or applying a layer of zinc coating using an electroplating technique. ▪ The resulting zinc coating provides a sacrificial layer that corrodes preferentially to the underlying metal, extending the lifespan of the metal. ▪ Galvanisation is commonly used in the construction industry for steel structures, such as buildings, bridges, and fences, as well as in the automotive industry for car bodies and parts. ▪ Iron pipes used for water supply in homes are galvanised to prevent rusting. However, ships are also made of iron and since a part of them remains underwater and the rest is constantly exposed to water drops, the process of rust formation is faster due to the presence of salts in the seawater. ▪ Even though ships are painted, they suffer significant damage from rusting, and a portion of their iron structure has to be replaced every year to maintain their integrity.
