Vitallium合金在几种日常饮品中的耐腐蚀性能研究

目的:研究Vitallium 2000+钴铬钼合金对几种日常饮品的耐腐蚀性。方法:应用电化学工作站及电化学分析仪测绘Vitallium合金在几种日常饮品中的动电位极化曲线,得到自腐蚀电位(Ecorr)、自腐蚀电流密度(Icorr)和极化电阻(Rp), 与对照组人工唾液进行比较分析。场发射扫描电子显微镜(FSEM)观察试样,比较腐蚀前及腐蚀后各组间形貌差异。结果:Vitallium合金在牛奶和弱碱水中, 自Icorr增大,Ecorr和Rp降低,耐腐蚀性能与对照组人工唾液亦有显著性差异(P<0.05);在可乐中Icorr降低,Ecorr和Rp增大,耐腐蚀性能与对照组人工唾液有显著性差异(P<0.05)。结论:牛奶、弱碱水可使Vitallium合金的耐腐蚀性能明显下降。

Evaluation on Corrosion Resistance of Vitallium 2000 Plus Co-Cr-Mo Alloy in SeveralDaily Drinks.

Objective: To study the corrosion resistance of Vitallium 2000 plus Co-Cr-Mo alloy in several daily drinks. Methods: Artificial saliva was served as control fluid.Electrochemical technique was adopted to measure the electric potential of corrosion(Ecorr), current density of corrosion(Icorr) and polarization resistance(Rp) of Vitallium 2000 plus Co-Cr-Mo alloy in three daily drinks, i.e. milk, cola and weak alkalinity water. Microstructural and phase diffraction were examined by field scanning electron microscope(FSEM). Results: Compared with those in artificial saliva, the Icorr of Vitallium 2000 plus Co-Cr-Mo alloy in milk and weak alkalinity water groups increased whileEcorr and Rp decreased significantly.However in cola, the Icorr decreased,while Ecorr and Rp increased significantly.The corrosion resistance in all three drinks showed significant differences(P<0.05). Conclusion: The corrosion resistance of Vitallium 2000 plus Co-Cr-Mo alloy decreased significantly in milk and weak alkalinity water