Iron articles rust readily whereas steel which is also mainly made of iron does not undergo corrosion.

Question

Give scientific reason:

Iron articles rust readily whereas steel which is also mainly made of iron does not undergo corrosion.

Answer 1

(1) Iron articles rust readily as iron reacts with oxygen and moisture of air to convert into its hydroxide and oxide (Fe₂O₃. x H₂O), while steel is an alloy of iron, carbon and chromium.

(2) The properties of an alloy are different from the properties of its constituents. The added metals increase its resistance to corrosion. It is more durable and clean.