Microstructural characteristics of cerium oxide conversion coatings obtained by various aqueous deposition methods
- Department of Metallurgical Engineering and, Graduate Center for Materials Research, University of Missouri-Rolla, Rolla, MO 65401 (United States)
Microstructural characteristics of cerium oxide conversion coatings obtained by electrolytic, dip-immersion and spray deposition methods from aqueous solutions were studied by transmission electron microscopy and electron diffraction analysis. The coatings were applied to aluminum alloy 7075-T6 panels and the pretreatment conditions were the same for all coating methods. The results indicated that the as-deposited coatings were all composed of nanocrystalline particles with narrow size distributions. Electron diffraction analysis revealed that the electrolytic and the spray coatings developed the same crystal structure, possibly Ce{sub 7}O{sub 12}, while the dip-immersion coating had a different structure that has not been reported in the literature. After post-treatment in phosphate solution, all three as-deposited coatings were converted to hydrated cerium phosphate.
- OSTI ID:
- 20748655
- Journal Information:
- Materials Characterization, Vol. 54, Issue 1; Other Information: DOI: 10.1016/j.matchar.2004.10.006; PII: S1044-5803(04)00234-7; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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