Electrochemical and xps study of local corrosion inhibition of Al-Cu alloy with anticorrosion pigments

Stuart Lyon, George Thompson, John Walton, Ivan Zin, Yuri Kuznetsov, Erika Kalman, Mykola Sakhnenko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The aim of this project is to study novel positive approaches for replacement of the chromate content in primer paints on aerospace alloys. This is being carried out by a collaborative team involving partners in Ukraine, Russia, Hungary and Great Britain. The work described here reports on the study of synergisms, using mixtures of conventional inorganic inhibitors, on the inhibition of Al-Cu alloy 2024 (or Russian equivalent). The comparative inhibition of chromate and an ecologically safe pigment mixture was studied using electrochemical impedance spectroscopy (EIS) and X-ray photo-electron spectroscopy (XPS). Using this approach, a relatively high protective ability of a chromate-free combination of phosphate, calcium and zinc releasing pigments was observed as a function of time. Subsequent experiments demonstrated effective cathodic inhibition of copper-containing intermetallic precipitates. Finally, XPS showed that the protective film formed on the intermetallic surface mainly consists of a zinc substituted calcium phosphate.

Original languageEnglish
Title of host publication47th Annual Conference of the Australasian Corrosion Association 2007
Subtitle of host publicationCorrosion Control 2007
Pages379-386
Number of pages8
Publication statusPublished - Dec 1 2007
Event47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007 - Sydney, NSW, Australia
Duration: Dec 4 2007Dec 5 2007

Publication series

Name47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007

Other

Other47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007
CountryAustralia
CitySydney, NSW
Period12/4/0712/5/07

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Keywords

  • Aluminium alloy
  • Electrochemical impedance spectroscopy
  • Inhibition
  • Surface analysis

ASJC Scopus subject areas

  • Surfaces and Interfaces

Cite this

Lyon, S., Thompson, G., Walton, J., Zin, I., Kuznetsov, Y., Kalman, E., & Sakhnenko, M. (2007). Electrochemical and xps study of local corrosion inhibition of Al-Cu alloy with anticorrosion pigments. In 47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007 (pp. 379-386). (47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007).