Electroluminescence of aluminium during electropolishing in nitric acid |
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| Affiliation: | 1. Faculty of Chemistry, University of Warsaw, 1 Pasteura Str., PL-02-093 Warsaw, Poland;2. Faculty of Materials Engineering, Warsaw University of Technology, 141 Wołoska Str., PL-02-507 Warsaw, Poland;1. Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid Flow Machinery, Polish Academy of Science, Fiszera 14, Gdansk 80-231, Poland;2. Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12, Gdansk 80-233, Poland |
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| Abstract: | Electropolishing of aluminium in 10 mol dm−3 aqueous nitric acid shows the emission of electroluminescence. The very high anodic current densities involved during electropolishing preclude the presence of all but the thinnest of surface oxide films, and this raises the question of the origins of the luminescence. The electroluminescence during electropolishing is compared with that occurring during anodising in phosphoric acid. |
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