In concrete constructions stress corrosion cracking and corrosion fatigue of reinforcement may occur. Stress corrosion cracking of low carbon reinforcing steel is the result of the influence of nitrate. In carbonated concrete the resistance to SCC is lower than in alkaline concrete. The sensitivity of the steel increases with decreasing carbon content.
In dynamically stressed cracked concrete constructions under sea water exposure (e.g. offshore constructions) corrosion fatigue may take place. Permanently immersed parts are more resistant than those occasionally sprayed. Epoxy coating cannot protect the steel sufficiently because the coating may be damaged as a consequence of fretting.