title: [Corrosion resistance of Co-Cr, Ni-Cr, Ni-Cr-Ti alloy in artificial saliva].
abstract: OBJECTIVE
  To evaluate the corrosion resistance of Co-Cr, Ni-Cr and Ni-Cr-Ti alloy in artificial saliva.
  
  
  METHODS
  Electrochemical methods were used to measure the self-corrosion potential (Ecorr), self-corrosion current density (Icorr) and polarization resistance (Rp) of three alloys .And the polarization curves of the three alloys were recorded too. One-way ANOVA with SPSS 11.0 software package was used for statistical analysis.
  
  
  RESULTS
  The Icorr of Co-Cr alloy was significantly lower than that of Ni-Cr alloy (P<0.05) and Ni-Cr-Ti alloy (P<0.05). The Icorr of Ni-Cr-Ti alloy was significantly lower than that of Ni-Cr alloy (P<0.05). The Rp of Co-Cr alloy was significantly higher than that of Ni-Cr alloy (P<0.05) and Ni-Cr-Ti alloy (P<0.05). The Rp of Ni-Cr-Ti alloy was significantly higher than that of Ni-Cr alloy(P<0.05). The Ecorr of Co-Cr alloy was significantly higher than that of Ni-Cr alloy (P<0.05) and Ni-Cr-Ti alloy (P<0.05).The Ecorr of Ni-Cr-Ti alloy was higher than that of Ni-Cr alloy but without significant difference(P>0.05).
  
  
  CONCLUSIONS
  The corrosion resistance of Co-Cr alloy is better than that of Ni-Cr and Ni-Cr-Ti alloy. The corrosion resistance of Ni-Cr-Ti alloy is worse than that of Ni-Cr alloy.
authors.affiliation: Affiliated Stomatological Hospital, College of Medical Science, Zhejiang University, Hangzhou 310006, Zhejiang Province, China. doctorsp@163.com
authors.forename: Ping
authors.initials: P
authors.lastname: Sun
authors.forename: Ying
authors.initials: Y
authors.lastname: Lu
authors.forename: Song
authors.initials: S
authors.lastname: Chen
mesh_terms: D000497:Alloys; D003343:Corrosion; D003722:Dental Alloys; D004563:Electrochemistry; D009532:Nickel; D012464:Saliva, Artificial; D014025:Titanium
chemical_list: D000497:Alloys; D003722:Dental Alloys; D012464:Saliva, Artificial; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium