Steel Corrosion in Concrete

This chapter introduces the mechanisms of steel corrosion in concrete. This corrosion is an electrochemical process in which the iron is removed from the steel being corroded and is dissolved into ferrous ions in the limited volume of pore solution present in the pores of the concrete surrounding the steel. The corrosion initiation and propagation processes in carbonation and chloride ingress environments are discussed. The different types of iron oxides and their transformations under different conditions are also briefly introduced.