Corrosion of aluminium in copper-aluminium couples under a marine environment: Influence of polyaniline deposited onto copper

Rosa Vera, Patricia Verdugo, Marco Orellana, Eduardo Muñoz

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

In this study, we examined how aluminium corrosion in Al-Cu/PANI galvanic couples in a marine environment is influenced by deposition of polyaniline (PANI) on copper. Polarization curves and immersion assays in 0.1. M NaCl were performed. The morphologies of etched Al and corrosion products were observed by SEM, and the Al ions in solution were quantified by atomic absorption spectroscopy. A reduction in aluminium damage due to galvanic corrosion was observed as a result of decreased effective area for the oxygen reduction reaction on Cu/PANI electrode. Furthermore, an electrochemical reduction of PANI from leucoemeraldine to emeraldine base is proposed.

Original languageEnglish
Pages (from-to)3803-3810
Number of pages8
JournalCorrosion Science
Volume52
Issue number11
DOIs
StatePublished - Nov 2010
Externally publishedYes

Keywords

  • A. Aluminium
  • A. Copper
  • C. Atmospheric corrosion
  • C. Polymer coatings

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