Question

Most metals in presence of air and water have eating away property.What is this phenomenon known as?Briefly explain the ways to prevent this phenomenon.

Answer 1

this is known as oxidation
..by painting the metals
... by using grease and oil

Answer 2

It is known as rusting. Rusting occurs due to presence of air and humidity . So to prevent it from rusting we have to paint it or deposing a layer of zinc