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Vol. 38 No. 10 (2026): Vol 38, Issue 10, 2026

Copyright (c) 2026 Md. Ashraful Alam, Aklima Jahan, M.M. Elsawy, Zainul Abedin Siddique, Dina Nasrin, M. Kamrul Hossain, Faisal Islam Chowdhury, Hitoshi Yashiro

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Corrosion Inhibition of Aluminum using Methyl-1H-Benzotriazole in Deaerated Fluoride-Sulphate Media: Corrosion Behaviour and Surface Protection

https://doi.org/10.14233/ajchem.2026.36676
Md. Ashraful Alam
Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram-4331, Bangladesh; Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan
https://orcid.org/0000-0001-7194-1893
Aklima Jahan
Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram-4331, Bangladesh; Division of Fundamental and Applied Sciences, Graduate School of Sciences and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan
https://orcid.org/0000-0002-6165-3035
M.M. Elsawy
Department of Chemistry, Faculty of Science (Girls), Al-Azhar University, P.O. Box 11754, Nasr City, Cairo, Egypt
https://orcid.org/0000-0001-8751-3885
Zainul Abedin Siddique
Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram-4331, Bangladesh
https://orcid.org/0000-0001-6146-8975
Dina Nasrin
Department of Chemistry, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh
https://orcid.org/0009-0005-1674-7197
M. Kamrul Hossain
Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram-4331, Bangladesh
https://orcid.org/0000-0002-3636-4338
Faisal Islam Chowdhury
Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram-4331, Bangladesh
https://orcid.org/0000-0002-0888-1143
Hitoshi Yashiro
Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan; Division of Fundamental and Applied Sciences, Graduate School of Sciences and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan
https://orcid.org/0000-0002-4238-364X

Corresponding Author(s) : Md. Ashraful Alam

ashrafchem84@cu.ac.bd

Asian Journal of Chemistry, Vol. 38 No. 10 (2026): Vol 38, Issue 10, 2026

Abstract

The inhibitive effect of methyl-1H-benzotriazole (Me-BTA) on pure aluminum was investigated in fluoride-sulphate media at different sulphate concentrations. The corrosion rate, surface roughness, surface morphology and elemental composition of aluminum were evaluated after 24 h of immersion at 80 ºC in deaerated fluoride-sulphate solutions both with and without Me-BTA. Weight-loss measurements showed that the addition of Me-BTA decreased the corrosion rate of aluminum under the investigated conditions. AFM analysis further revealed a reduction in the surface roughness of the aluminum specimens in the presence of Me-BTA, indicating a less damaged surface after exposure to the aggressive medium. SEM analysis revealed fewer corrosion-related surface products on the Me-BTA-treated specimens than on the uninhibited aluminum. EDX further detected nitrogen and increased carbon content after treatment, consistent with the presence of Me-BTA-derived species on the surface. These surface and elemental changes support the protective role of Me-BTA and the formation of an inhibitor-derived layer on aluminum in the investigated deaerated fluoride-sulphate media.

Keywords

Aluminum Corrosion Inhibition Methyl-1H-benzotriazole Atomic force microscopy Scanning electron microscopy
(1)
Alam, M. A.; Jahan, A.; Elsawy, M.; Siddique, Z. A.; Nasrin, D.; Hossain, M. K.; Chowdhury, F. I.; Yashiro, H. Corrosion Inhibition of Aluminum Using Methyl-1H-Benzotriazole in Deaerated Fluoride-Sulphate Media: Corrosion Behaviour and Surface Protection. ajc 2026, 38, 2751-2759.
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