Response of Nano-Crystalline Cerium based Conversion Coatings on Al 2024-T3 to Chloride Environments
Abstract
Nanocrystalline cerium-based conversion coatings were found to be effective at retarding corrosion of Al 2024-T3 in sodium chloride environments. Cerium oxide coatings were deposited by spraying an aqueous solution made with cerium chloride onto cleaned panels. After deposition, the coatings were treated in a phosphate solution, which produced dense, nanocrystalline coatings composed of hydrated cerium phosphate. Visually, the coatings appeared to inhibit corrosion and the formation of salt tails for at least 14 days in ASTM B117 neutral salt spray corrosion testing. Cross-sectional imaging using transmission electron microscopy and compositional depth profiling using Auger spectroscopic analysis after salt spray exposure revealed that an aluminum oxide layer was present on the surface of the cerium phosphate coating.
Recommended Citation
S. You et al., "Response of Nano-Crystalline Cerium based Conversion Coatings on Al 2024-T3 to Chloride Environments," Materials Letters, Elsevier, Jul 2007.
The definitive version is available at https://doi.org/10.1016/j.matlet.2006.12.062
Department(s)
Materials Science and Engineering
Research Center/Lab(s)
Peaslee Steel Manufacturing Research Center
Keywords and Phrases
Aluminum 2024-T3; Cerium-Based Conversion Coating; Corrosion Resistance
International Standard Serial Number (ISSN)
0167-577X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2007 Elsevier, All rights reserved.
Publication Date
01 Jul 2007
