Corrosion inhibitors for anodised aluminium

M. Whelan, K. Barton, J. Cassidy, J. Colreavy, B. Duffy

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)75-83
Number of pages9
JournalSurface and Coatings Technology
Volume227
DOIs
Publication statusPublished - 25 Jul 2013

Keywords

  • Aluminium
  • Anodised
  • Corrosion
  • EIS
  • Inhibitors
  • Salt spray

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