Effect of chloride ion on the anodic polarization behavior of the Zr65Al7.5Ni10Cu17.5 amorphous alloy in phosphate buffered solution

S. Hiromoto, A. P. Tsai, M. Sumita, T. Hanawa

Research output: Contribution to journalArticle

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Abstract

The corrosion behavior of the Zr65Al7.5Ni10Cu17.5 amorphous alloy was investigated in a phosphate buffered saline solution and in phosphate-citric acid buffered solutions with various chloride-ion concentrations from 0 to 1.0 M, to examine the performance of the alloy as a biomaterial. The surface condition of the non-polarized and polarized alloy in the passive region was characterized using X-ray photoelectron spectroscopy. The susceptibility of this alloy to pitting corrosion was small at a small amount of chloride ion, but it increased with the chloride-ion concentration. Phosphate ion adsorbed on zirconium oxide in the surface raised the susceptibility to the pitting corrosion. On the other hand, phosphate ion is hardly adsorbed by aluminum oxide, so aluminum oxide in the surface diminished the susceptibility to the pitting corrosion. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1651-1660
Number of pages10
JournalCorrosion Science
Volume42
Issue number9
DOIs
Publication statusPublished - 2000 Sep 1

Keywords

  • Biomaterial
  • Chloride ion
  • Polarization
  • X-ray photoelectron spectroscopy
  • Zirconium-based amorphous alloy

ASJC Scopus subject areas

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

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