论文部分内容阅读
目的:评价不同抛光方法对纯钛铸件表面耐腐蚀性的影响。方法:制作纯钛试件30个,随机分为机械抛光组、化学抛光组和电解抛光组对其表面进行抛光处理。然后在人工唾液中,运用电化学方法测量试件的自然腐蚀电位(Ecorr)、极化电阻(Rp)、腐蚀电流密度(Icorr)。应用扫描电镜观察试件腐蚀前后表面形貌的变化。结果:在人工唾液中,三组之间Ecorr、Rp和Icorr的比较分别有统计学意义(P<0.01),两两比较显示三组之间均有差异。结论:铸造纯钛试件表面的耐腐蚀性为电解抛光组>化学抛光组>机械抛光组。
Objective: To evaluate the effect of different polishing methods on the corrosion resistance of pure titanium castings. Methods: 30 pure titanium specimens were made and were randomly divided into mechanical polishing group, chemical polishing group and electrolytic polishing group to polish their surface. Then in the artificial saliva, the electrochemical corrosion resistance (Ecorr), polarization resistance (Rp) and corrosion current density (Icorr) were measured by electrochemical method. Scanning electron microscopy was used to observe the change of the surface morphology before and after the specimen was etched. Results: In the artificial saliva, the comparison of Ecorr, Rp and Icorr between the three groups were statistically significant (P <0.01), and any pairwise comparison showed that there was a difference between the three groups. Conclusion: The corrosion resistance of the surface of cast titanium specimen is that of electrolytic polishing> chemical polishing> mechanical polishing.