标题：Electrochemical and theoretical quantum approaches on the inhibition of mild steel corrosion in acidic medium containing chloride using synthesized 1H-indole-2,3-dione derivative
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：9
页码：3313-3326
出版社：University of Mohammed Premier Oujda
摘要：1H-Indole-2,3-dione derivatives (P2 and P3), have been synthesized characterized by NMR spectroscopy. and tested as corrosion inhibitors for mild steel in HCl solution using potentiodynamic polarization curves and electrochemical impedance spectroscopy. Potentiodynamic polarization curve measurements showed that the investigated compounds were a mixed-type inhibitors. Their inhibition efficiencies improved with concentration and reached a maximum at 10 -3 M . Electrochemical impedance spectroscopy (EIS) studies suggested that P3 inhibit mild steel corrosion by becoming adsorbate at the metallic/electrolyte surfaces. Adsorption of the inhibitors on the mild steel surface was found to obey Langmuir's adsorption isotherm. Further, the electronic structural calculations using quantum chemical methods were found to be in a good agreement with the results of the experimental studies.
