after a period objects made of iron or steel become coated with rust. The rusting of iron is a serious problem and wastes

after a period objects made of iron or steel become coated with rust.

1.	after a period objects made of iron or steel become coated with rust. The rusting of iron is a serious problem and wastes
Answer» This is called RUSTING of IRON. It happens due to presence of moisture in AIR. It detoriates the iron QUALITY.