In addition to chloride induced corrosion , the other commonly occurring type of re-bar corrosion in reinforced concrete structure is that induced by ingress of atmospheric carbon Dia-oxied into concrete commonly refer to as carbonation induced cracking.

Non marine environment carbonation induced corrosion is the main corrosion mechanism in reinforced concrete.

Carbonation penetrates the concrete cover and corrosion take place.

Corrosion then initiated when the carbonation front reaches the steel reinforcement.With time corrosion product cause cracking ,spalling and delamination of concrete cover which may comprise the serviceability and the stability of the structure.

A design method for avoiding damage due to carbonation induced corrosion of steel reinforced with concrete is describe.

Key feature lead to carbonation induced in concrete corrosion of steel reinforcement in a reinforced concrete member. A presence of crack in tension zone of the reinforced concrete structure will allow oxygen and water to reach the steel reinforcement.