Electrochemical Behavior of 1,3-bis(1-Phenylethyl) Urea as a Corrosion Inhibitor for Carbon Steel in 1 M HCl

1,3-bis(1-Phenylethyl) urea was investigated as a good corrosion inhibitor for carbon steel by electrochemical techniques in 1 M HCl at a temperature range of 305–335 K. The investigation was done by electrochemical techniques such as potentiodynamic Tafel polarization and impedance spectroscopy. The calculated corrosion inhibition efficiency of inhibitor increases with their increasing concentrations. The Tafel polarization method reveals that the inhibitor acts as mixed type inhibitor. The inhibition effect of inhibitor attributed due to the adsorption on surface of carbon steel from 1 M HCl. The adsorption of inhibitor obeys the Langmuir’s adsorption isotherm. The activation parameters indicate that the adsorption process is exothermic in nature. The scanning electron microscopic measurement gives a visual idea about the formation of protective layer on carbon steel surfaces, which retards the corrosion process.