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Vol. 36 No. 12 (2024): Vol 36 Issue 12, 2024

Copyright (c) 2024 Dr. Anita Kumari Miranda House

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Experimental and Surface Morphological Studies of Imidazolium-based Ionic Liquid as Corrosion Inhibitor for Mild Steel in Sulphuric Acid Medium

https://doi.org/10.14233/ajchem.2024.32857
Anita Kumari
Department of Chemistry, Miranda House, University of Delhi, Delhi-110021, India
https://orcid.org/0009-0008-9983-3024
Taruna Singh
Department of Chemistry, Miranda House, University of Delhi, Delhi-110021, India
Sandeep Kumar
Department of Physics, Government Degree College Drang (Afflilated to Sardar Patel University, Mandi), Narla-175012, India
Raj Kumar Thakur
Department of Chemistry, Vallabh Government College (Afflilated to Sardar Patel University, Mandi), Mandi-175001, India

Corresponding Author(s) : Anita Kumari

anita.kumari@mirandahouse.ac.in

Asian Journal of Chemistry, Vol. 36 No. 12 (2024): Vol 36 Issue 12, 2024

Abstract

The corrosion inhibitor 1-butyl-3-methylimidazolium chloride [(BMIM)Cl], an ionic liquid, was used to determine the potency of inhibitor in 0.5 M of H2SO4 on the surface of mild steel. The studies performed weight loss measurements over time and electrochemical impedance spectroscopy (EIS). Weight loss studies evaluate the degree of degradation in a mild steel (MS) specimen subjected to sulphuric acid by assessing the reduction in weight of the exposed sample over the duration of exposure. EIS measures the electrochemical properties of the mild steel sample in a sulphuric acid solution interface. Through experimental analysis involving the use of mild steel and ionic liquid, it was established that the material possesses a high potential to reduce the corrosion rate of mild steel in an acidic solution. Also, the surface characterization of the steel sample treated with or without the [(BMIM)Cl] inhibitor in sulphuric acid was characterized using both SEM & AFM techniques. A cross-sectional analysis by SEM and AFM give a physical confirmation of the findings that the ionic liquid, [(BMIM)Cl], when mixed with sulphuric acid, deposits a barrier on the steel surface. The results support the application of [(BMIM)Cl] in preventing corrosion of steel samples in an acidic environment, owing to the formation of a passivating layer through the reaction of the ionic liquid with the metal surface.

Keywords

Corrosion inhibitor Sulphuric acid Ionic liquid Mild steel Weight loss Electrochemical studies
Kumari, A., Singh, T., Kumar, S., & Thakur, R. K. (2024). Experimental and Surface Morphological Studies of Imidazolium-based Ionic Liquid as Corrosion Inhibitor for Mild Steel in Sulphuric Acid Medium. Asian Journal of Chemistry, 36(12), 2946–2950. https://doi.org/10.14233/ajchem.2024.32857
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