Question

Why is zinc coated on iron as galvanisation when zinc is more reactive than iron?​

Answer 1

Answer:

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

Answer:

The main reason behind this is for rust prevention. The use of zinc for preventing rusting is mainly because of following reasons:

1)It form thin layer which prevents entering of water and oxygen underneath .As a result Iron is safe from rusting.

2)It act as sacrifical metal. Zinc is more reactive than iron , so it oxidises in preference to the iron object.

Explanation:

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