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Corrosion Inhibition of Aluminium Alloy AA6063-T5 by Vanadates: Local Surface Chemical Events Elucidated by Confocal Raman Micro-Spectroscopy
Abstract
Chemical interactions between aqueous vanadium species and aluminium alloy AA6063-T5 were investigated in vanadate-containing NaCl solutions. Confocal Raman and X-ray photoelectron spectroscopy experiments were utilised to gain insight into the mechanism of corrosion inhibition by vanadates. A greenish-grey coloured surface layer, consisting of V+4 and V+5 polymerized species, was seen to form on the alloy surface, especially on top of cathodic micrometre-sized IMPs, whereby suppressing oxygen reduction kinetics. The results suggest a two-step mechanism of corrosion inhibition in which V+5 species are first reduced to V+4 or V+3 species above cathodic IMPs, and then oxidized to mixed-valence V+5/V+4 polymerized compounds.
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Authors (7)
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Dmitry Kharitonov Dr.
- Belarusian State Technological University Department of Chemistry, Electrochemical Production Technology and Materials for Electronic Equipment
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Jens Sommertune
- Research Institutes of Sweden Surface, Process and Formulation
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Cem Örnek
- KTH Royal Institute of Technology Division of Surface and Corrosion Science
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Irina Kurilo Prof.
- Belarusian State Technological University Department of Physical, Colloid and Analytical Chemistry
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Per Claesson Prof.
- KTH Royal Institute of Technology Division of Surface and Corrosion Science
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Jinshan Pan
- KTH Royal Institute of Technology Division of Surface and Corrosion Science
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
CORROSION SCIENCE
no. 148,
pages 237 - 250,
ISSN: 0010-938X - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Kharitonov, D., Sommertune J., Örnek C., Ryl J., Kurilo I., Claesson P., Pan J.: Corrosion Inhibition of Aluminium Alloy AA6063-T5 by Vanadates: Local Surface Chemical Events Elucidated by Confocal Raman Micro-Spectroscopy// CORROSION SCIENCE. -Vol. 148, (2019), s.237-250
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.corsci.2018.12.011
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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