Enhancing copper corrosion resistance in highly caustic environments: Evaluation of environmentally friendly inorganic inhibitors and mechanistic insights

Issam, saber and Khadija, dahmani and Otmane, Kharbouch and Zakia, Aribou and Soumya, Ferraa and Nouf H., Alotaibi and Marouane, El-alouani and Rachid, Hsissou and Basheer M., Al-Maswari and Mouhsine, Galai and Mohamed Ebn, Touhami and Zaroual, Aziz and M.S. El, youbi (2024) Enhancing copper corrosion resistance in highly caustic environments: Evaluation of environmentally friendly inorganic inhibitors and mechanistic insights. International Journal of Electrochemical Science, 19 (11). ISSN 14523981

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Abstract

During this study, two inorganic glasses materials with chemical compositions of (1−x) (2Bi2 O3 ⋅B2 O3)–x BaO (with x=0.2 (BiB-Ba0.2) and x=0.6 and (BiB-Ba0.6)) were synthetized characterized and investigated as viable, ecofriendly, and sustainable inhibitors to mitigate copper corrosion in a highly caustic solution containing 0.5 M H2SO4 solution. To evaluate inhibition processes, several techniques were employed, including potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM). Furthermore, the results show that the two inhibitors studied, BiB-Ba0.2 and BiB-Ba0.6, have higher corrosion inhibition efficiencies at the optimum concentration (10−3 M), reaching 91.2 % and 90.8 %, respectively. Moreover, these findings suggest that the two inorganic compounds elaborated possess inhibitors of mixed types. Copper oxide (Cu2O) production is markedly delayed when the two inhibitors are added to the acid medium, according to the findings of the XRD, FTIR, SEM/EDS, and AFM investigations. This outcome is explained by the development of a shield that lessens surface damage to copper metal, producing a smoother surface morphology.

Item Type:	Article
Uncontrolled Keywords:	Anticorrosion inhibitor; Copper; Eco-friendly; Electrochemical tests; Sulfuric acid; Synthesis
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Mr Eranna Library
Date Deposited:	04 Dec 2025 11:57
Last Modified:	04 Dec 2025 11:57
URI:	http://eprints.uni-mysore.ac.in/id/eprint/18202

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