Corrosion rate of steel reinforcements after carbonation of concrete

In this paper corrosion rate of steel reinforcements after carbonation of concrete was studied using AC impedance technique and weight loss measurements taking the effects of cement type, water to binder ratio, cover thickness, relative humidity and the like into account. Based on the study a corrosion rate eguation that includes the above factors and the relative humidity of 40 to 95% as variables was proposed by modifying Stern-Geary eguation. Ways of applying the eguation to the inside and outside environments of buildings were discussed, which resulted in a proposal of estimated corrsion rates after carbonation.