Corrosion characteristics of α-Ti and Ti2Cu composing Ti-Cu alloys

Yukyo Takada, Osamu Okuno

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31 Citations (Scopus)


A series of binary Ti-Cu alloys containing 5-20 mass% Cu was prepared, and the corrosion behavior of α-Ti and Ti2Cu composing the Ti-Cu alloys were examined based on the anodic polarization curves and released ions in 0.9% NaCl and 1% lactic acid solutions. In both solutions, the Ti-Cu alloys showed the same anodic polarization curves as titanium in the condition below 1.4 V. However, precipitation of Ti2Cu contributed to a small increase in current densitiy in the transpassive region beyond 1.4 V. The amount of Cu ions released from Ti2Cu was 0.260 and 1.003 (μg/cm 2/7 days) in 0.9% NaCl and 1% lactic acid solutions respectively. Although these values were larger than those from α-Ti (0.0379 ± 0.0041 and 0.0962 ± 0.0327 (μg/cm2/7 days) in NaCl and lactic acid solutions respectively), they were not greater than those from type 4 gold alloy under the same conditions.

Original languageEnglish
Pages (from-to)610-615
Number of pages6
JournalDental Materials Journal
Issue number4
Publication statusPublished - 2005 Dec


  • Corrosion
  • Elution test
  • Ti-Cu alloy


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