Corrosion Inhibition of Carbon Steel in 1 M HCl by Carbendazim Experimental and Theoretical Study

Hicham, Zgueni; Mohammed, El Mesky; Nabil, Amri; Safi, Zaki; Wazzan, Nuha; Berisha, Avni; Ahmed, Moussaif; Elhoussine, Mabrouk; Znini, Mohamed; Ahmad, Oubair; Driss, Chebabe

doi:10.22034/abec.2023.709687

Corrosion Inhibition of Carbon Steel in 1 M HCl by Carbendazim Experimental and Theoretical Study

Document Type : Original Article

Authors

¹ Laboratory of Materials Engineering for the Environment and Natural Ressources, Faculty of Sciences and Techniques, Moulay Ismail University of Meknes, B.P 509, Boutalamine, 52000, Errachidia, Morocco

² Laboratory of Engineering, Organometallic, Molecular and Environment (LIMOME), Faculty of Sciences, University Sidi Mohamed Ben Abdellah, Fez, Morocco

³ Department of Chemistry, Faculty of Sciences, Al Azhar University – Gaza, Gaza, Palestine, P.O. Box 1277

⁴ King Abdulaziz University, Chemistry Department, Faculty of Science, P.O. Box 4280, Jeddah 21589, Saudi Arabia

⁵ Department of Chemistry, Faculty of Natural and Mathematics Science, University of Prishtina, 10000 Prishtina, Kosovo

⁶ National Center for Energy, Sciences and Nuclear Techniques, Rabat, Morocco

10.22034/abec.2023.709687

Abstract

The effect of the benzimidazole-2-ylcarbamate methyl (Carbendazim) in corrosion inhibition for carbon steel has been studied using stationary and transient electrochemical techniques. The potentiodynamic curves show that Carbendazim acts as a mixed-type inhibitor. The electrochemical impedance diagrams show a capacitive response of carbon steel with and without inhibitors at different concentrations in 1M HCl. The polarization resistance increases with increasing inhibitor concentration. Consequently, the inhibition efficiency increases and reaches 84% at 10^-2M and its adsorption follows the Langmuir isotherm. This shows that the protective effect of Carbendazim is significant in an acidic medium. The study of the synergistic effect with KI shows that an equimolar mixture of KI and Carbendazim compound enhances the inhibition efficiency. The theoretical investigation of the tested compound ability to inhibit corrosion using DFT shows that the HOMO, LUMO, and electrostatic potential maps surfaces can qualitatively identify the most nucleophilic and electrophilic centers, this will enable us to give an adsorption mechanism for the inhibitor studied on the metal surface.

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