EELS study of oxidation state of tungsten in anodic alumina film formed on Al-6·5 at.-%W alloy

U. Bangert, X. Zhou, L. Iglesias-Rubianes, P. Skeldon, G. E. Thompson

Research output: Contribution to journalArticlepeer-review

Abstract

Spatially resolved electron energy loss spectroscopy (EELS) has been used to investigate the oxidation state of tungsten species in a barrier anodic oxide film formed on an Al-6·5 at.-%W alloy in 0·1M sodium tungstate electrolyte at 293 K. Tungsten 4f core level excitation indicates the presence mainly of W6+ species in the anodic film. Insight into the bonding arrangements within the anodic oxide is also provided by valence band excitation and revelation of the oxygen edge and its associated pre-edge structure.

Original languageEnglish
Pages (from-to)306-309
Number of pages4
JournalTransactions of the Institute of Metal Finishing
Volume85
Issue number6
DOIs
Publication statusPublished - Nov 2007

Keywords

  • Aluminium
  • Anodic film
  • Anodising
  • EELS
  • Tungsten

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