Electrochemical behaviour of commercially pure titanium and Co-Cr alloy in Ringer’s solution
来源期刊：Rare Metals2002年第4期
论文作者：LIANG Chenghao and MOU ThanqiSchool of Chemical Engineering, Dalian University of Technology, Dalian , China
文章页码：266 - 270
摘 要：<正>The electrochemical behaviors of commercially pure titanium （CP Ti） and Co-Cr alloy in Ringer’s solution havebeen investigated. The results indicate that the electric potential of passive region for CP Ti is up to 3000 mV, and its pas-sive current density is 3.078 μA/cm2. The excellent corrosion resistance of CP Ti can be attributed to the formation of TiO2oxide film. The passive region of Co-Cr alloy is 770 mV, which is narrower than that of CP Ti. However, no hysteresisloops are found in the reverse scanning curves of Cu-Cr alloy. A complex oxide film of Co3O4, Co2O3, and Cr2O3 formed onthe surface provides Co-Cr alloy with a stable electrochemistry property. The corrosion rates of the crevice samples increasewith the pH value of medium decreasing. The electron probe microanalyzer （EPMA） analysis indicates that Ti in CP Ti andCo, Cr in Co-Cr alloy dissolve in crevice area due to the Sealed-Cell effect.
摘要：<正>The electrochemical behaviors of commercially pure titanium （CP Ti） and Co-Cr alloy in Ringer’s solution havebeen investigated. The results indicate that the electric potential of passive region for CP Ti is up to 3000 mV, and its pas-sive current density is 3.078 μA/cm2. The excellent corrosion resistance of CP Ti can be attributed to the formation of TiO2oxide film. The passive region of Co-Cr alloy is 770 mV, which is narrower than that of CP Ti. However, no hysteresisloops are found in the reverse scanning curves of Cu-Cr alloy. A complex oxide film of Co3O4, Co2O3, and Cr2O3 formed onthe surface provides Co-Cr alloy with a stable electrochemistry property. The corrosion rates of the crevice samples increasewith the pH value of medium decreasing. The electron probe microanalyzer （EPMA） analysis indicates that Ti in CP Ti andCo, Cr in Co-Cr alloy dissolve in crevice area due to the Sealed-Cell effect.
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