Effect of sodium molybdate and sodium tungstate in concrete rebar corrosion

Abstract

Purpose This paper aims to identify an inhibitor to protect rebar corrosion in concrete. Design/methodology/approach The authors use the simple method of polarization and calculate the change in open-circuit potential and corrosion current density. Findings Sodium molybdate is an efficient inhibitor compared with sodium tungstate for rebar corrosion in concrete. Research limitations/implications This paper has limitation of 0.0001 M concentration of inhibitors for 400 days of exposure in 3.5 per cent sodium chloride solution. Originality/value The research focused on the concentration of both inhibitors in the range from 0.1 to 0.0001 M, which resulted in greater structural protection from corrosion in adverse conditions, such as coastal areas.