Copper redistribution during corrosion of aluminum alloys

N. Dimitrov, J. A. Mann, Karl Sieradzki

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

We describe a new quantitative electrochemical technique for measuring the copper redistribution that occurs during corrosion and pretreatment of high-strength copper-containing aluminum alloys. Underpotential deposition (upd) of Pb on Cu was used to assay the surface coverage of Cu. Model experiments using samples of known Al-Cu ratios were used to evaluate the accuracy of the technique and develop a calibration curve. The results demonstrated the accuracy of the method to within 2%. The elemental copper remaining on the surface of Al 2024-T3 samples after various pretreatment/corrosion procedures was determined using the upd technique. A simple treatment involving open-circuit etching of the alloy surface in 3 M HNO3 was found to be most efficient for the removal of Cu from the Al alloy surface. In accord with a recent observation of Bucheit et al.,1 convection was found to enhance copper redistribution on an Al 2024-T3 sample in 0.5 M NaCl solution.

Original languageEnglish (US)
Pages (from-to)98-102
Number of pages5
JournalJournal of the Electrochemical Society
Volume146
Issue number1
StatePublished - 1999

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aluminum alloys
Copper
Aluminum alloys
corrosion
Corrosion
copper
pretreatment
copper alloys
high strength
Etching
Assays
convection
etching
Calibration
Networks (circuits)
curves
Experiments

ASJC Scopus subject areas

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

Cite this

Copper redistribution during corrosion of aluminum alloys. / Dimitrov, N.; Mann, J. A.; Sieradzki, Karl.

In: Journal of the Electrochemical Society, Vol. 146, No. 1, 1999, p. 98-102.

Research output: Contribution to journalArticle

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