Dealloying and corrosion of Al alloy 2024-T3

M. B. Vukmirovic, N. Dimitrov, Karl Sieradzki

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

We present results of a comprehensive electrochemical study aimed at determining the factors that control the corrosion evolution of the important structural alloy Al 2024-T3. An important aspect of corrosion in this alloy is copper redistribution. The redistributed copper serves to enhance the kinetics of the corrosion process and presents some major difficulties with respect to development of new families of conversion coatings. Two major sources of "mobile" copper are discussed, the Al2CuMg S-phase and copper in solid solution. In each case, a dealloying mechanism is responsible for liberating copper that becomes available to redistribution by solid state and/or liquid phase transport mechanisms. This work is concerned with identifying the relative importance of these sources of copper and the active transport mechanisms. In order to decouple the sources of copper, we designed "synthetic" 2024 alloys that emulate the oxygen reduction kinetics of the real alloy. Our results indicate that, in principal, both sources of copper are operative during redistribution and, for the particular alloy that we examined, both contribute about equally to the amount of redistributed copper.

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume149
Issue number9
DOIs
StatePublished - Sep 1 2002

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Copper
corrosion
Corrosion
copper
Kinetics
copper alloys
Copper alloys
kinetics
Solid solutions
liquid phases
solid solutions
Oxygen
solid state
coatings
Coatings
Liquids
oxygen

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Dealloying and corrosion of Al alloy 2024-T3. / Vukmirovic, M. B.; Dimitrov, N.; Sieradzki, Karl.

In: Journal of the Electrochemical Society, Vol. 149, No. 9, 01.09.2002.

Research output: Contribution to journalArticle

Vukmirovic, M. B. ; Dimitrov, N. ; Sieradzki, Karl. / Dealloying and corrosion of Al alloy 2024-T3. In: Journal of the Electrochemical Society. 2002 ; Vol. 149, No. 9.
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