Impedance spectroscopy of chromate-free conversion coatings on copper-containing aluminum alloys D16 and B95T3
https://doi.org/10.61852/2949-3412-2025-3-2-80-90
Abstract
Electrochemical impedance spectroscopy is a method for studying various properties of coatings, including conversion coatings on aluminum alloys. This method allows to analyze corrosion processes and protection mechanisms, providing information about the structure and properties of coatings. Chromate-free coating technologies by chemical oxidation continue to evolve, so understanding what characteristics coatings on various aluminum alloys will have, depending on the composition of the converting solution and modifying additives, is an urgent task. In this article, inhibited and non-inhibited chromate-free conversion coatings of IFKHANAL-3 modified with 1,2,3-benzotriazole and tolyltriazole (5-methylbenzotriazole) were studied using the electrochemical impedance method. It has been shown that modifying additives have different effects on coatings on D16 and V95T3 alloys, which is probably due to the different content of alloying elements and, first of all, the amount of copper in the alloys. In this case, the subsequent filling of coatings in a corrosion inhibitor solution shows the greatest effect for modified coatings if the initial coating had greater uniformity, according to the calculated impedance parameters.
About the Authors
D. O. Chugunov
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky Prospect, 119071, Moscow
Yu. A. Kuzenkov
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky Prospect, 119071, Moscow
References
1. A. Lasia, Electrochemical Impedance Spectroscopy and its Applications, Springer, 2014, 367 p. doi: 10.1007/978-1-4614-8933-7
2. M.E. Orazem and B. Tribollet, Electrochemical Impedance Spectroscopy, Wiley, 2008, 525 p. doi: 10.1002/9780470381588
3. A.S. Nguyen and N. Pébère, A local electrochemical impedance study of the selfhealing properties of waterborne coatings on 2024 aluminium alloy, Electrochim. Acta, 2016, 222, 1806–1817. doi: 10.1016/j.electacta.2016.11.152
4. E.V. Parfenov, A.L. Yerokhin and A. Matthews, Impedance spectroscopy characterisation of PEO process and coatings on aluminium, Thin Solid Films, 2007, 516, no. 2–4, 428–432. doi: 10.1016/j.tsf.2007.06.169
5. И.М. Медведев, А.Е. Кутырев и И.А. Волков, Исследование влияния наличия коррозионных повреждений на спектры импеданса анодно-оксидных покрытий, Электрохимия, 2022, 58, № 6, 261–272. doi: 10.31857/S042485702206007X
6. A.S. Nguyen, N. Causse, M. Musiani, M.E. Orazem, N. Pébère and B. Tribollet, Determination of water uptake in organic coatings deposited on 2024 aluminium alloy: Comparison between impedance measurements and gravimetry, Prog. Org. Coat., 2017, 112, 93–100. doi: 10.1016/j.porgcoat.2017.07.004
7. T. Zhang, H. Wang, Y. Li, X. Qian, B. Li, W. Yu, X. Zhang, J. Lin and H. Tang, Investigation of the microstructure, growth mechanism, and corrosion behavior of a new Zr–Ti conversion coating on 6016 aluminum alloy, J. Mater. Res. Technol., 2024, 30, 7585–7596. doi: 10.1016/j.jmrt.2024.05.138
8. H.H. Zhang, X. Zhang, H. Bian, L. Zhang, Y. Chen, Y. Yang and Z. Zhang, Superhydrophobic and self-healing silane-ceria composite coating implanted with 1,5-naphthalenediol inhibitor for corrosion protection of AA2024-T3 aluminum alloy, Surf. Coat. Technol., 2024, 476, 130256. doi: 10.1016/j.surfcoat.2023.130256
9. Commission Directive 2001/59/EC of 6 August 2001 Adapting to technical progress for the 28th time Council Directive 67/548/EEC on the approximation of laws, regulations and administrative provisions concerning the classification, packaging and labeling of hazardous substances relation to the EEA). Official Journal L 225, 21/08/2001, p. 0001–0333.
10. A.R. Khan, H.-J. Zhang, Z. Jun, S.M. Eldin, N. S. Alsaiari and K.M. Katubi, Electrochemical corrosion resistance of aluminum alloy 6101 with cerium-based coatings in an alkaline environment, Front. Chem., 2022, 10, 1066958. doi: https://doi.org/10.3389/fchem.2022.1066958
11. X. Guo, J. Wang, L. Huang, Y. Wang, L. Ma, D. Zhang and L. Ma, Corrosion inhibition and adsorption process of 3-amino-5-mercapto-1,2,4-triazole on aluminium alloy: Experimental and Theoretical Studies, Front. Mater., 2022, 9, 874899 doi: https://doi.org/10.3389/fmats.2022.874899
12. P. Rodič, S. Zanna, I. Milošev and P. Marcus, Degradation of sol-gel acrylic coatings based on Si and Zr investigated using electrochemical impedance, infrared and X-Ray Photoelectron Spectroscopies, Front. Mater., 2021, 8, 756447 doi: https://doi.org/10.3389/fmats.2021.756447
13. B. Minhas, S. Dino, L. Huang and D. Wu, Active corrosion protection by epoxy coating on Li2CO3-pretreated anodized aluminum alloy 2024-T3, Front. Mater., 2022, 8, 804328 doi: https://doi.org/10.3389/fmats.2021.804328
14. Yu.A. Kuzenkov, D.O. Chugunov, S.V. Oleynik and V.L. Voititsky, Protective chromate-free conversion coatings on AMg6 aluminum alloy with different types of surface treatment, Int. J. Corros. Scale Inhib., 2022, 11, no. 2, 541–552. doi: 10.17675/2305-6894-2022-11-2-5
15. A.S. Koryakin, Yu.A. Kuzenkov, S.V. Oleinik and V.L. Voititsky, Chromium-free conversion protective coatings on 1424 aluminum alloy, Prot. Met. Phys. Chem. Surf., 2020, 56, no. 7, 1305–1310. doi: 10.1134/s2070205120070096
16. Yu.A. Kuzenkov, D.O. Chugunov, V.A. Karpov, T.T. Trang, S.V. Bel’skii and N.V. Thang, Protective properties of chromate-free conversion coatings for coppercontaining aluminum alloys in tropical climates, Int. J. Corros. Scale Inhib., 2024, 13, no. 3, 1664–1672. doi: 10.17675/2305-6894-2024-13-3-17
17. Ю.Б. Макарычев, Ю.А. Кузенков, Д.О. Чугунов, О.Ю. Графов и А.Д. Алиев, Комбинированное нанесение полимерных пленок на основе силанов для защиты алюминиевого сплава АМг3 от коррозии, Коррозия: защита материалов и методы исследования, 2024, 2, № 2, 108–121. doi: 10.61852/2949-3412-2024-2-2-108-121
Review
For citations:
Chugunov D.O., Kuzenkov Yu.A. Impedance spectroscopy of chromate-free conversion coatings on copper-containing aluminum alloys D16 and B95T3. Title in english. 2025;(2):80-90. (In Russ.) https://doi.org/10.61852/2949-3412-2025-3-2-80-90
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