Journal
SURFACE & COATINGS TECHNOLOGY
Volume 227, Issue -, Pages 75-83Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2013.02.029
Keywords
Anodised; Aluminium; Corrosion; Inhibitors; Salt spray; EIS
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A novel sealing process for anodised aluminium has been developed based on inclusion of environmentally compliant corrosion inhibitors. Nanoporous oxide films formed by sulphuric acid anodising on aerospace grade AA2024-T3 have been sealed with a combination of corrosion inhibitors and surface hydration. The corrosion resistance was evaluated using electrochemical impedance spectroscopy and accelerated corrosion testing in a neutral salt spray environment. The synergistic anti-corrosion mechanism of the inhibitors within the oxide film on the corrosion prone alloy was determined. The technique described offers numerous opportunities for industrial applications. (C) 2013 Elsevier B.V. All rights reserved.
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