Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach
Abstract There is a high demand for high performance, effective and eco-friendly corrosion inhibitors for industrial applications. Consequently, many researchers are focused on developing efficient, cost-effective materials to protect metals. In this study, an ecofriendly chitosan methionine derivat...
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Nature Portfolio
2025-05-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-98981-2 |
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| author | S. F. Hamza Seham Shahen Amal M. Abdel‑karim Ahmed A. El-Rashedy Amira M. Hyba |
| author_facet | S. F. Hamza Seham Shahen Amal M. Abdel‑karim Ahmed A. El-Rashedy Amira M. Hyba |
| author_sort | S. F. Hamza |
| collection | DOAJ |
| description | Abstract There is a high demand for high performance, effective and eco-friendly corrosion inhibitors for industrial applications. Consequently, many researchers are focused on developing efficient, cost-effective materials to protect metals. In this study, an ecofriendly chitosan methionine derivative (M) was developed, synthesized, characterized, and tested for its anticorrosion properties. The ability of this compound as a corrosion inhibitor for carbon steel (CS) was confirmed through weight loss measurements (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) studies in a 1.0 M hydrochloric acid solution. The findings showed that the inhibitor, M, achieved a maximum inhibition efficiency of 99.8% at a concentration of 100 ppm by the PDP method. Additionally, the corrosion potential value, being less than 85 mV, supported classifying M as a mixed-type inhibitor with a cathodic tendency. The adsorption behavior of the inhibitor on the CS surface was consistent with Langmuir’s adsorption isotherm. EIS data also confirmed that increasing inhibitor concentration raised the charge transfer resistance (R ct), indicating improved protection. Surface examination using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) revealed the formation of a protective layer of the M molecules on the CS surface. Moreover, theoretical studies, including analyses of the highest occupied molecular orbital (EHOMO), lowest unoccupied molecular orbital (ELUMO), dipole moment (µ), were thoroughly examined. Overall, both experimental and theoretical findings demonstrate that this derivative can effectively form a protective layer and mitigate corrosion. |
| format | Article |
| id | doaj-art-1eee2a38a6a24c5b84740b5817d81b8d |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-1eee2a38a6a24c5b84740b5817d81b8d2025-08-20T02:15:25ZengNature PortfolioScientific Reports2045-23222025-05-0115112410.1038/s41598-025-98981-2Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approachS. F. Hamza0Seham Shahen1Amal M. Abdel‑karim2Ahmed A. El-Rashedy3Amira M. Hyba4Department of Chemistry, Faculty of Science (Girls), Al-Azhar UniversityDepartment of Chemistry, Faculty of Science (Girls), Al-Azhar UniversityPhysical Chemistry Department, National Research CentreNatural and Microbial Products Department, National Research CentreDepartment of Chemistry, Faculty of Science (Girls), Al-Azhar UniversityAbstract There is a high demand for high performance, effective and eco-friendly corrosion inhibitors for industrial applications. Consequently, many researchers are focused on developing efficient, cost-effective materials to protect metals. In this study, an ecofriendly chitosan methionine derivative (M) was developed, synthesized, characterized, and tested for its anticorrosion properties. The ability of this compound as a corrosion inhibitor for carbon steel (CS) was confirmed through weight loss measurements (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) studies in a 1.0 M hydrochloric acid solution. The findings showed that the inhibitor, M, achieved a maximum inhibition efficiency of 99.8% at a concentration of 100 ppm by the PDP method. Additionally, the corrosion potential value, being less than 85 mV, supported classifying M as a mixed-type inhibitor with a cathodic tendency. The adsorption behavior of the inhibitor on the CS surface was consistent with Langmuir’s adsorption isotherm. EIS data also confirmed that increasing inhibitor concentration raised the charge transfer resistance (R ct), indicating improved protection. Surface examination using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) revealed the formation of a protective layer of the M molecules on the CS surface. Moreover, theoretical studies, including analyses of the highest occupied molecular orbital (EHOMO), lowest unoccupied molecular orbital (ELUMO), dipole moment (µ), were thoroughly examined. Overall, both experimental and theoretical findings demonstrate that this derivative can effectively form a protective layer and mitigate corrosion.https://doi.org/10.1038/s41598-025-98981-2Chitosan derivativeGreen corrosion inhibitorCarbon steelElectrochemical measurementsTheoretical calculations |
| spellingShingle | S. F. Hamza Seham Shahen Amal M. Abdel‑karim Ahmed A. El-Rashedy Amira M. Hyba Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach Scientific Reports Chitosan derivative Green corrosion inhibitor Carbon steel Electrochemical measurements Theoretical calculations |
| title | Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach |
| title_full | Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach |
| title_fullStr | Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach |
| title_full_unstemmed | Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach |
| title_short | Eco-friendly corrosion inhibitor chitosan methionine for carbon steel in 1 M hydrochloric acid solution: experimental and theoretical approach |
| title_sort | eco friendly corrosion inhibitor chitosan methionine for carbon steel in 1 m hydrochloric acid solution experimental and theoretical approach |
| topic | Chitosan derivative Green corrosion inhibitor Carbon steel Electrochemical measurements Theoretical calculations |
| url | https://doi.org/10.1038/s41598-025-98981-2 |
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