摘要
目的在人工唾液中氯离子浓度升高的条件下,用动电位极化曲线法研究镍铬合金、钴铬合金和含钛镍铬合金的耐腐蚀性能的变化。方法测定三种铬合金在氯化钠浓度分别为0.9%、2%、3%的人工唾液中的自腐蚀电位、自腐蚀电流密度,对其进行比较分析。结果随着氯离子浓度升高,三种铬合金的自腐蚀电流密度均增大,腐蚀速度加快。钴铬合金受氯化钠浓度的影响最小。结论在高氯环境中,三种铬合金腐蚀性能均降低,但钴铬合金耐腐蚀能力相对较强,这将影响它们的使用寿命。
Objective To study the effects on the corrosion resistance of Cr alloy in the artificial saliva with higher NaCl consistency in vitro by the way of polarization curve.Methods Electrochemical technique was used to measure the electric potential of corrosion（Ecorr）,current density of corrosion（Icorr） Ni-Cr alloy,Co-Cr alloy and Ti alloy in the artificial saliva with 0.9%,2%,3% NaCl.Results The NaCl consistency in the artificial saliva was increased.The current density of corrosion（Icorr） of three types of Cr alloy all increaseed.The change of Co-Cr alloy was least.Conclusion In the artificial saliva with higher NaCl consistency in vitro,the corrosion resistance of three types of alloys descended evidently.The corrosion resistance of Co-Cr alloy was superior to that of Ni-Cr alloy and Ti alloy.
出处
《口腔医学》
CAS
2010年第8期485-487,共3页
Stomatology
关键词
牙科合金
腐蚀
极化曲线
氯离子
dental alloy
corrosion
polarization curve
Cl-ion
