title: Corrosion characteristics of alpha-Ti and Ti2Cu composing Ti-Cu alloys.
abstract: A series of binary Ti-Cu alloys containing 5-20 mass% Cu was prepared, and the corrosion behavior of alpha-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 (microg/cm2/7 days) in 0.9% NaCl and 1% lactic acid solutions respectively. Although these values were larger than those from alpha-Ti (0.0379 +/- 0.0041 and 0.0962 +/- 0.0327 (microg/cm2/7days) in NaCl and lactic acid solutions respectively), they were not greater than those from type 4 gold alloy under the same conditions.
authors.affiliation: Division of Dental Biomaterials, Graduate School of Dentistry, Tohoku University, Aoba-ku, Sendai, Japan. takada@mail.tains.tohoku.ac.jp
authors.forename: Yukyo
authors.initials: Y
authors.lastname: Takada
authors.forename: Osamu
authors.initials: O
authors.lastname: Okuno
mesh_terms: D003300:Copper / Q000737:chemistry; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry*; D004563:Electrochemistry; D004577:Electron Probe Microanalysis; D007477:Ions; D019344:Lactic Acid; D008422:Materials Testing; D012965:Sodium Chloride; D012995:Solubility; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D003722:Dental Alloys; D007477:Ions; D019344:Lactic Acid; D012965:Sodium Chloride; D003300:Copper; D014025:Titanium