Corrosion behavior and microstructures of experimental Ti-Au alloys

Masatoshi Takahashi, Masafumi Kikuchi, Yukyo Takada, Osamu Okuno, Toru Okabe

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Anodic polarization was performed in 0.9% NaCl and 1% lactic acid solutions to characterize the relationship between the corrosion behavior and microstructures of cast Ti-Au (5-40%) alloys. An abrupt increase in the current density occurred at approximately 0.6 V vs. SCE for the 30% and 40% Au alloys in the 0.9% NaCl solution. The microstructures after corrosion testing indicated that this breakdown may have been caused by the preferential dissolution of the Ti3Au. However, the potential for preferential dissolution was higher than the breakdown potential of stainless steel or Co-Cr alloy, which meant that the corrosion resistance of the Ti-Au alloys was superior. In 1% lactic acid solution, the corrosion resistance of the Ti-Au alloys was excellent, with no breakdown at any composition. In the present test solutions, the Ti-Au alloys up to 20% Au had good corrosion resistance comparable to that for pure titanium.

Original languageEnglish
Pages (from-to)109-116
Number of pages8
JournalDental materials journal
Volume23
Issue number2
DOIs
Publication statusPublished - 2004 Jun

Keywords

  • Corrosion behavior
  • Microstructure
  • Titanium alloys

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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