The corrosion behavior of sputter-deposited Mo-Nb alloys in 12 M HCl solution

P. Y. Park, E. Akiyama, H. Habazaki, A. Kawashima, K. Asami, K. Hashimoto

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Single bec phase Mo-Nb alloys are successfully prepared by sputter deposition. These alloys are spontaneously passivated and show significantly high corrosion resistance in 12 M HCl. Their corrosion rates are lower than those of molybdenum and niobium. XPS analysis revealed that the passive films formed on Mo-Nb alloys by open circuit immersion in 12 M HCl are composed of outer niobium-enriched oxyhydroxide and inner molybdenum-enriched oxyhyroxide with a concentration gradient. The concentration gradient in the passive film on Mo-Nb stems from the fact that the corrosion potential of these alloys is close to or rather exceeds the potential for the transpassive dissolution of molybdenum.

Original languageEnglish
Pages (from-to)1731-1750
Number of pages20
JournalCorrosion Science
Volume38
Issue number10
DOIs
Publication statusPublished - 1996 Oct 1

Keywords

  • A. Molybdenum alloy
  • A. Sputtered film
  • B. Polarization
  • B. XPS
  • C. Passive films

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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