Corrosion Inhibition of Carbon Steel by a Quinazolinone Derivative in Acidic Media Via Computational and Experimental Techniques | ||
| Egyptian Journal of Chemistry | ||
| Articles in Press, Accepted Manuscript, Available Online from 23 November 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2025.425987.12375 | ||
| Authors | ||
| Samir abedelhady* 1; walid fathalla2; Mohamed Saad3; Farid El-Dessoki4 | ||
| 1chemistry dep. fac. of sci. port said univ. | ||
| 2port said university, faculty of engineering | ||
| 3Faculty of Science Port Said University | ||
| 4Chemistry Department, Faculty of science, Port-Said University, Port-said, Egypt | ||
| Abstract | ||
| In this study, 3-propyl-2-thioxo-2,3-dihydroquinazolin-4(1H)-one was evaluated as a corrosion inhibitor for carbon steel (CS) in 1.0 M HCl. This investigation was confirmed using mass loss (ML) and electrochemical methodologies: potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS). The effectiveness of inhibition rises with rising concentrations of the quinazolinone derivative and diminishes at all concentrations at elevated temperatures. The activation and adsorption variables were estimated and analyzed. The adsorption of the inhibitor adheres to the Langmuir model. PP curves demonstrate the compound behavior as a mixed-type inhibitor. EIS measurements revealed that rising inhibitor concentration improved the charge transfer resistance, reflecting enhanced protection. Scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR) were employed to assess the impact of the quinazolinone derivative on the CS surface. The molecular inhibitory effect has been verified via quantum chemical calculations, which confirmed its adsorption on the CS surface. | ||
| Keywords | ||
| Quinazoline derivative; Inhibitor; Adsorption; Electrochemical methodologies; Charge transfer resistance | ||
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