An insight on the corrosion inhibition of mild steel in aggressive medium by Solanum Tuberosum extract

Abstract

This review investigates, the corrosion inhibitive action Acid extract of Solanum tuberosum was on mild steel in 1M hydrochloric acid (HCl) and H₂SO₄ media by weight loss measurements (WL) as chemical measurements and potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) as electrochemicals ones. The study indicates that as acid concentration increases corrosion rate increases. The corrosion inhibition efficiency increases with increase in concentration of extract. The obtained results reveal that acid extract of Solanum tuberosum was act as an efficient inhibitor.The adsorption of  Solanum tuberosum extract  obeyed Temkin adsorption isotherm. The S. tuberosum extract shows a good inhibition efficiency in H₂SO₄ medium than in HCl medium. This may be due to the availability of more sites on the metal surface in H₂SO₄ medium due to a lower adsorption of sulfate ions on the steel surface.Cathodic and anodic polarization curves show that Solanum tuberosum extract is a mixed-type inhibitor