Abstract
Effect of red mud (RM) and ground granulated blast-furnace slag (GGBS) on passivation and chloride-induced corrosion of a 10CrMo steel in alkaline concrete pore solutions was studied using electrochemical measurements. Also, passive films of 10CrMo steel formed in different alkaline solutions were investigated by XPS and AFM. The addition of RM and GGBS might not change the major components of passive films, yet the redox processes and electronic properties of the passivated steel were significantly affected, which could be detrimental to its passivity. However, enhanced pitting corrosion resistance was highlighted for 10CrMo steel in the presence of RM and GGBS.
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