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Active corrosion protection of various aluminium alloys by lithium-leaching coatings

Journal Article (2019)
Author(s)

P. Visser (TU Delft - (OLD) MSE-6, Akzo Nobel)

Herman Terryn (Vrije Universiteit Brussel, TU Delft - (OLD) MSE-6)

Johannes M.C. Mol (TU Delft - (OLD) MSE-6)

Research Group
(OLD) MSE-6
Copyright
© 2019 P. Visser, H.A. Terryn, J.M.C. Mol
DOI related publication
https://doi.org/10.1002/sia.6638
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 P. Visser, H.A. Terryn, J.M.C. Mol
Research Group
(OLD) MSE-6
Issue number
12
Volume number
51
Pages (from-to)
1276-1287
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Abstract

This study presents the active protective properties of lithium-leaching coatings for a range of aluminium alloys. Coatings with and without lithium carbonate as leachable inhibitor were applied on the aluminium alloys, artificially damaged and exposed to the neutral salt spray. A combined approach of scanning electron microscopy and electrochemical measurements revealed that the lithium carbonate leaching coating provided effective corrosion inhibition on AA2024, AA7075, AA5083, and AA6014 by the formation of a protective layer in the defect area and preventing local corrosion processes despite the different intrinsic electrochemical activity of the alloys.