XPS study of passive films formed on an iron—aluminium intermetallic compound in acid solution

S. Frangini, R. Giorgi, J. Lascovich, A. Mignone

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Abstract

Surface films grown on the intermetallic B2‐FeAl alloy after wet‐mechanical polishing and after a wide range of anodic polarization conditions in 1N H2SO4have been analysed by x‐ray photoelectron spectroscopy. The results clearly indicate a remarkable enrichment of aluminium within all the films regardless of the growth conditions. Analysis of the metal–oxygen bonds has made it possible to distinguish several oxidized species. It has been found that most of the iron hydroxides are concentrated on the film surfaces, whereas aluminium hydroxides appear more homogeneously distributed over the depth of the oxide films. The thickness of the film shows an abrupt increase at 1 V, accompanied by a marked increment of Al hydroxide species. Copyright © 1994 John Wiley & Sons Ltd.
Original languageEnglish
Pages (from-to)435 - 441
Number of pages7
JournalSurface and Interface Analysis
Volume21
Issue number6-7
DOIs
Publication statusPublished - 1994

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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