Corrosion of pure aluminium and aluminium alloy: A comparative study using a slow positron beam

Y. C. Wu, P. H. Li, X. D. Xue, S. J. Wang, A. Kallis, P. G. Coleman, T. Zhai

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Corrosion-related defects in pure Al and AA 2037 Al alloy have been investigated by positron beam-based Doppler broadening energy spectroscopy. Defect profiles have been analyzed by measuring the S parameter as a function of incident positron energy up to 30 keV. When pure Al samples are immersed in 1M NaOH for various times, a significant increase in the S parameter near the surface is observed. This implies that the corrosion process involves the creation of defects and nanometer voids. In contrast, a significant decrease in the S parameter is observed after the corrosion of water-quenched Al alloy by the same method, which is interpreted as being a result of Cu enrichment near the metal-oxide interface layer.

Original languageEnglish
Article number012065
JournalJournal of Physics: Conference Series
Volume262
Issue number1
DOIs
StatePublished - 2011

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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