Evaluation of 14-(p-tolyl)-14H-dibenzo[a,j]xanthene as a highly efficient organic corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, theoretical, and surface characterization

Azzeddine, Belkheiri and Khadija, Dahmani and Mohamed, Khattabi and Khaoula, Mzioud and Otmane, Kharbouch and Mouhsine, Galai and Nadia, Dkhireche and Zakaria, Benzekri and Said, Boukhris and Rafa, Almeer and Basheer M., Al-Maswari and Mohamed Ebn, Touhami (2024) Evaluation of 14-(p-tolyl)-14H-dibenzo[a,j]xanthene as a highly efficient organic corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, theoretical, and surface characterization. International Journal of Electrochemical Science, 19 (12). ISSN 14523981

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Abstract

Corrosion of mild steel, particularly in acidic environments such as hydrochloric acid (HCl), remains a critical issue due to its impact on material durability, economic costs, and safety concerns. This study introduces 14-(p-tolyl)-14H-dibenzo[a,j]xanthene (ZM5), a novel and highly effective organic corrosion inhibitor, to mitigate this challenge. Employing advanced electrochemical techniques: electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP), we evaluated ZM5’s performance in a 1 M HCl solution, revealing an impressive inhibition efficiency of 94.7 %. Surface characterization using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) further confirmed the formation of a robust protective film on the steel surface, shedding light on ZM5’s adsorption mechanisms. Complementing the experimental findings, Density Functional Theory (DFT) simulations provided theoretical insights into the anti-corrosion mechanism of ZM5, aligning well with observed results. These findings underscore ZM5's potential as a highly promising corrosion inhibitor for industrial applications, effectively enhancing the corrosion resistance of mild steel in aggressive environments.

Item Type:	Article
Uncontrolled Keywords:	Corrosion inhibition; Density functional theory; HCl; Mild steel
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Mr Eranna Library
Date Deposited:	01 Dec 2025 12:14
Last Modified:	02 Dec 2025 04:48
URI:	http://eprints.uni-mysore.ac.in/id/eprint/18170

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