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.
