Corrosion studies of steel rebar samples in neutral sodium chloride solution also in the presence of a bio-based (green) inhibitor

Abstract

Steel rebar samples obtained from a steel mill operating in Hungary were investigated in several sets of laboratory experiments to reveal some of their corrosion properties in aqueous solutions containing sodium chloride salt. The effectiveness of an organic inhibitor extracted from a cheap organic waste of orange peel (so-called bio-based "green" inhibitor) was also studied. Results of the electrochemical polarisation measurements, as well as those of the direct corrosion weight-loss testing, showed the inhibition potential of the chosen new green inhibitor in stagnant neutral aqueous 3.5 wt% NaCl solutions in contact with air. It makes this bio-based inhibitor a promising candidate for using it as corrosion mitigating admixture in steel reinforced concrete.