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Active corrosion protection of various aluminium alloys by lithium-leaching coatings |
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| Authors: | Peter Visser Herman Terryn Johannes M.C. Mol |
| Affiliation: | 1. Department of Materials Science and Engineering, Delft University of Technology, Delft, The Netherlands;2. Department of Materials Science and Engineering, Delft University of Technology, Delft, The Netherlands Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering (SURF), Brussels, Belgium |
| 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. |
| Keywords: | aluminium active corrosion protection alloy inhibitor lithium |