In this paper, corroding process of reinforcement in concrete and mortar subjected to sulfuric acid attack was investigated by visual observation, by measuring profile of sulfate ion and pH with respective indicators, and by measuring corrosion area and weight loss of reinforcement. Application of the electro-chemical monitoring methods (half-cell potential, polarization resistance, and concrete resistivity), which are usually used for reinforcement subjected to chloride induced corrosion, to the sulfuric acid attack was also discussed
Obtained results showed that sulfate ion affected the corrosion initiation of reinforcement before the cover concrete was dissolved, and that the corrosion initiation can be detected by the concrete resistivity.
