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目的:探讨人工唾液,可乐,弱碱水和漱口水对Vitallium合金耐腐蚀性的影响。方法:将Vitallium试件室温下浸泡在人工唾液、可乐、弱碱水和漱口水中,用电化学腐蚀测量方法,测试试件的自腐蚀电位(Ecorr)、腐蚀电流密度(Icorr)、极化电阻(Rp),以人工唾液为对照组进行比较分析。应用扫描电子显微镜(SEM)观察试样腐蚀前后形貌变化。结果:Vitallium合金在弱碱水中腐蚀电流密度(Icorr)增大,极化电阻(Rp)降低,与对照组人工唾液有明显差异(P<0.05),在漱口水中的腐蚀电流密度(Icorr)降低,极化电阻(Rp)增大,与对照组有明显差异(P<0.05)。在可乐中的腐蚀电流密度(Icorr)和极化电阻(Rp)与对照组相比无显著差异(P>0.05)。结论:Vitallium合金在在弱碱水中耐腐蚀性最差,在漱口水中耐腐蚀性最好。
Objective: To investigate the effects of artificial saliva, cola, weak alkaline water and mouthwash on the corrosion resistance of Vitallium alloy. Methods: Vitallium specimens were immersed in artificial saliva, cola, weak alkaline water and mouthwash at room temperature. The electrochemical corrosion test method was used to test the self-corrosion potential (Ecorr), corrosion current density (Icorr), polarization Resistance (Rp), artificial saliva for the control group for comparative analysis. Scanning electron microscopy (SEM) was used to observe the morphological changes before and after the sample was etched. RESULTS: The corrosion current density (Icorr) of Vitallium alloy in weak alkaline water increased, the polarization resistance (Rp) decreased, and the artificial saliva of the control group was significantly different (P <0.05) Decreased, the polarization resistance (Rp) increased significantly with the control group (P <0.05). The corrosion current density (Icorr) and polarization resistance (Rp) in Coke had no significant difference compared with the control group (P> 0.05). Conclusion: Vitallium alloy has the lowest corrosion resistance in weak alkaline water and the best corrosion resistance in mouthwash.