Electrochemical and quantum chemical studies of some azomethine compounds as corrosion inhibitors for mild steel in 1 M hydrochloric acid |
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| Affiliation: | 1. Laboratoire d''Electrochimie des Matériaux Moléculaires et Complexes (LEMMC), Département de Génie des Procédés, Faculté de Technologie, Université FERHAT ABBAS SETIF-1, 19000 Sétif, Algeria;2. Département de Pétrochimie & Génie des procédés, Faculté de Technologie, Université 20 Août 1955-Skikda, BP 26 Route d''El-Hadaiek 21000 Skikda, Algeria;3. Unité de Recherche Appliquée en Energies Renouvelables, URAER, Centre de Développement des Energies Renouvelables, CDER, 47133, Ghardaïa, Algeria;1. Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, South west Petroleum University, Chengdu, Sichuan 610500, China;1. Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait;2. Department of Chemistry, Faculty of science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan;3. Laboratoire d''Electrochimie des Matériaux Moléculaires et Complexes (LEMMC), Université Ferhat Abbas Sétif 1 Faculté de Technologie;4. Département de Génie des Procédés, Faculté de Technologie, Université Saad dahleb Blida-1-Algéria;5. Department of Chemistry, The University of Jordan, Amman 11942, Jordan |
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| Abstract: | The corrosion inhibition effect of new azomethine compounds: PhN N C (COCH3)NC6H4Y {Y = OCH3 (SB1), CH3 (SB2), H (SB3), Br (SB4) and Y = Cl (SB5)} on mild steel in 1 M HCl, was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and quantum chemistry analysis. It has been found that the inhibition efficiency increased with increasing inhibitor concentration. The polarization curves showed that these Schiff bases function as mixed inhibitors. The adsorption of studied compounds on mild steel surface was found to follow the Langmuir isotherm. Molecular modeling was used to correlate corrosion inhibition properties and calculated quantum chemical parameters. |
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| Keywords: | A Acid solutions A Mild steel B EIS B Polarization C Acid corrosion |
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