Carbon steel is a candidate material for the disposal container of high-level nuclear waste in a deep geological repository in China, which will be subject to general corrosion and localised attack. In this work, the effects of Cl − , SO 4 2-and CO 3 2− concentrations on the general corrosion and crevice corrosion of carbon steel were studied by immersion tests and electrochemical measurements. The results show that Cl − promotes general corrosion, while SO 4 2− and CO 3 2− inhibit general corrosion. In a single ion solution, SO 4 2− is the most obvious in promoting the crevice corrosion, which is different from the result of carbon steel in groundwater solution. Cl − , rather than SO 4 2− , dominates the crevice corrosion process of carbon steel in groundwater solution.ARTICLE HISTORY