Corrosion Mitigation of Carbon Steel in Acidic Media Using Glimepiride: A Sulfonylurea Derivative as an Eco-Friendly Inhibitor | ||||
| Alfarama Journal of Basic & Applied Sciences | ||||
| Volume 6, Issue 3, July 2025, Page 277-303 PDF (1.56 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajbas.2025.377231.1253 | ||||
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| Authors | ||||
S.A. Abd El Maksoud1; Abd El Aziz Fouda2; Haby Badawy   1
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| 1Department of chemistry, Faculty of Science, Port Said University, Port Said 42522, Egypt | ||||
| 2Department of Chemistry, Faculty of Science, Mansoura University, Mansoura-35516, Egypt | ||||
| Abstract | ||||
| This study investigates the effectiveness of expired Glimepiride drug, a sulfonylurea derivative, as a corrosion inhibitor for carbon steel (CS) degrading in 1.0 M hydrochloric acid solutions. Experimental and theoretical procedures examine glimepiride inhibition efficiency as Weight loss (WL) measurements, electrochemical techniques (potentiodynamic polarization (PP), electrochemical frequency modulation (EFM), and electrochemical impedance spectroscopy (EIS)) and surface characterization methods (Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS)) were employed. The inhibition efficiency increased with both rising inhibitor concentration and increasing temperature (303–318 K). Adsorption studies indicated that the inhibitors followed the Temkin isotherm, with thermodynamic and kinetic parameters suggesting a chemical adsorption. glimepiride act as mixed type inhibitor as a result from electrochemical techniques. SEM and XPS studies revealed that the inhibitor was adsorbed on the surface of carbon steel, resulting in a considerable reduction in corrosion rate. Theoretical calculations gave useful information on Glimepiride's molecular characteristics, supporting experimental findings that Glimepiride acts as a corrosion inhibitor. | ||||
| Keywords | ||||
| Glimepiride; Corrosion inhibition; Electrochemical; Impedance; Carbon steel | ||||
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