Theoretical and electrochemical studies of metformin as corrosion inhibitor for mild steel in hydrochloric acid solution

Abstract

The effect of Metformin was investigated by gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopy. Polarization results revealed that Metformin acted as mixed type inhibitors. The inhibition efficiency increases with increasing the inhibitors concentration and decreases with increasing the temperature. The gravimetric and potentiodynamic polarization results were in good agreement with the electrochemical impedance spectroscopy data. © 2012 by ESG.