Next Article in Journal
Johnson–Cook Constitutive Model Parameters Estimation of 22MnB5 Hot Stamping Steel for Automotive Application Produced via the TSCR Process
Previous Article in Journal
Weld Formation and Characteristics of Hot-Wire Laser Welding in Aluminum Alloy Narrow-Gap Joints
Previous Article in Special Issue
Corrosion Resistance and Surface Conductivity of 446 Stainless Steel with Electrochemical Cr-Enrichment and Nitridation for Proton Exchange Membrane Fuel Cell (PEMFC) Bipolar Plates
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Metals
Volume 15
Issue 7
10.3390/met15070810
metals-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Corrosion Inhibition of C38 Steel in 1M HCl Using Benzoxazole-2-Thione: Electrochemical, SEM-EDX, and Theoretical Studies

by
Mohamed Omari
1,
Khalid Bouiti
2,
Said Jebbari
3,
Nabil Lahrache
2,
Ali Barhoumi
4,
Najoua Labjar
2,*,
Souad El Hajjaji
5,*,
Mahado Said-Ahmed
6,
Mounim Lebrini
6,
Hamid Nasrellah
7,
Mohammed El Idrissi
8 and
Abdessamad Tounsi
1
1
Agro-industrial, Environmental and Ecological Processes Team, Faculty of Science and Techniques of Benia Mellal, Sultan Moulay Slimane University, Beni Mellal 23000, Morocco
2
LS3MN2E, CERNE2D, ENSAM, Mohammed V University in Rabat, Rabat 10050, Morocco
3
Laboratory of Bio-organic Chemistry, Department of Chemistry, Faculty of Sciences, Chouaib Doukkali University, El Jadida 10000, Morocco
4
Molecular Modelling and Spectroscopy Research Team, Faculty of Science, Chouaib Doukkali University, P.O. Box 20, El Jadida 24000, Morocco
5
LS3MN2E, CERNE2D, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10100, Morocco
6
Laboratoire des Matériaux et Molécules en Milieu Agressif, L3MA EA7526, Campus de Schœlcher, Université des Antilles, Schoelcher 97233, Martinique
7
Laboratory of Organic Bioorganic Chemistry and Environment, Chouaib Doukkali University, El Jadida 24000, Morocco
8
Chemical Processes and Applied Materials Team, Faculty Polydisciplinary Sultan Moulay Slimane University, Beni-Mellal 23000, Morocco
*
Authors to whom correspondence should be addressed.
Metals 2025, 15(7), 810; https://doi.org/10.3390/met15070810 (registering DOI)
Submission received: 15 May 2025 / Revised: 26 June 2025 / Accepted: 14 July 2025 / Published: 19 July 2025
(This article belongs to the Special Issue Feature Paper Collection of “Current Challenges in Corrosion Research" (2nd Edition))
Versions Notes

Abstract

This study explores the corrosion inhibition of C38 steel in a 1 M hydrochloric acid (HCl) solution using a novel benzoxazole-2-thione compound. The inhibitor was synthesized and structurally characterized by both 1H NMR (DMSO-d6/TMS) and 13C NMR spectroscopy. Electrochemical techniques, including Tafel polarization and electrochemical impedance spectroscopy, were employed to evaluate the inhibition performance. The results indicate that the benzoxazole-2-thione significantly reduces the corrosion rate, achieving a maximum inhibition efficiency of 95.25% at a concentration of 10−4 M. To gain deeper insights into the inhibition mechanism, theoretical methods such as density functional theory, Monte Carlo simulations, and molecular dynamics were applied to investigate the adsorption behavior of the compound on the steel surface. The adsorption process follows the Langmuir isotherm model, suggesting the coexistence of physisorption and chemisorption interactions. Surface morphology and elemental composition analyses using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX) confirm the formation of a protective inhibitor film on the steel surface.
Keywords: corrosion inhibition; benzoxazole-2-thione; C38 steel; EIS; Tafel polarization; SEM-EDX; 1H NMR and 13C NMR spectroscopy; DFT corrosion inhibition; benzoxazole-2-thione; C38 steel; EIS; Tafel polarization; SEM-EDX; 1H NMR and 13C NMR spectroscopy; DFT

Share and Cite

MDPI and ACS Style

Omari, M.; Bouiti, K.; Jebbari, S.; Lahrache, N.; Barhoumi, A.; Labjar, N.; El Hajjaji, S.; Said-Ahmed, M.; Lebrini, M.; Nasrellah, H.; et al. Corrosion Inhibition of C38 Steel in 1M HCl Using Benzoxazole-2-Thione: Electrochemical, SEM-EDX, and Theoretical Studies. Metals 2025, 15, 810. https://doi.org/10.3390/met15070810

AMA Style

Omari M, Bouiti K, Jebbari S, Lahrache N, Barhoumi A, Labjar N, El Hajjaji S, Said-Ahmed M, Lebrini M, Nasrellah H, et al. Corrosion Inhibition of C38 Steel in 1M HCl Using Benzoxazole-2-Thione: Electrochemical, SEM-EDX, and Theoretical Studies. Metals. 2025; 15(7):810. https://doi.org/10.3390/met15070810

Chicago/Turabian Style

Omari, Mohamed, Khalid Bouiti, Said Jebbari, Nabil Lahrache, Ali Barhoumi, Najoua Labjar, Souad El Hajjaji, Mahado Said-Ahmed, Mounim Lebrini, Hamid Nasrellah, and et al. 2025. "Corrosion Inhibition of C38 Steel in 1M HCl Using Benzoxazole-2-Thione: Electrochemical, SEM-EDX, and Theoretical Studies" Metals 15, no. 7: 810. https://doi.org/10.3390/met15070810

APA Style

Omari, M., Bouiti, K., Jebbari, S., Lahrache, N., Barhoumi, A., Labjar, N., El Hajjaji, S., Said-Ahmed, M., Lebrini, M., Nasrellah, H., Idrissi, M. E., & Tounsi, A. (2025). Corrosion Inhibition of C38 Steel in 1M HCl Using Benzoxazole-2-Thione: Electrochemical, SEM-EDX, and Theoretical Studies. Metals, 15(7), 810. https://doi.org/10.3390/met15070810

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop