Corrosion behavior of reinforced concrete exposed to sodium chloride solution and composite sodium chloride-sodium sulfate solution

Abstract

The present paper presents the findings of an experimental work that was undertaken to investigate the effect of aggressive ions such as chloride ions and sulfate ions on rebar corrosion in concrete. In the present work, reinforced concrete specimens were prepared with Portland pozzolana cement and Tempcore TMT steel bar at w/c ratios of 0.45, 0.50 and 0.55. The reinforced concrete specimens were exposed to sodium chloride solutions and composite solutions of sodium chloride and sodium sulfate. Corrosion tests such as half-cell potential measurement and linear polarization resistance technique for corrosion current density measurement were carried out on the specimens after a specified exposure period. From the obtained results of potential values and corrosion current density, behavior of reinforced concrete subjected to chloride and composite chloride-sulfate solutions has been assessed.