Question

How does galvanising prevent rusting? Galvanisation The process of depositing a thin layer of a non-reactive metal such as zinc on the surface of iron is known as galvanisation. This metallic layer prevents the iron to come in contact with air and moisture. Buckets, drums, roofs, pipes, etc are galvanised to prevent rusting. hysical and Chemical Changes​

Answer 1

Answer:

Explanation:

Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object.

Answer 2

In the method of galvanisation, surface of iron is covered with layer of more active metal like zinc. In this way, iron is prevented to come in contact with air and moisture which are required for rusting. Zinc metal does not undergo corrosion and hence prevents the rusting of iron.