华西口腔医学杂志2011，Vol.29Issue(5)：485-487,493,4.DOI:10.3969/j.issn.1000-1182.2011.05.009
3种非贵金属烤瓷合金的耐蚀性研究
Study on corrosion resistance of three non-noble porcelain alloys
吴芝凯 1许胜 2黎为 2腾劲 2李宁1
作者信息
- 1. 四川大学制造科学与工程学院,成都610059
- 2. 广西医科大学附属口腔医院 齿科技术中心,南宁530021
- 折叠
摘要
Abstract
Objective To study the electrochemical corrosion behavior of Co-Cr, Ni-Cr and Ni-Cr-Be based porcelain alloys in NaCI solution. Methods Five samples of each alloy were made respectively, electric polarization curve of each alloy was obtained using potentiodynamic polarization technique. Self-corrosion potential (Econ), self-corrosion current density (Iomr), passive region and transpassivation potential were tested. Microstructure and constituent was examined using scanning electron microscopy and energy dispersive spectroscopy. Results Co-Cr alloy possessed the most desirable corrosion resistance because of its integrated, homogeneous and compact passive film. The poor compactness of Ni-Cr alloy's passive film decreased its corrosion resistance. .Ni-Cr-Be alloy exhibited the worst corrosion resistance due to the Cr and Mo depleted Ni-Be eutectic phases in the alloy. Conclusion Taking biological security into consideration, it is necessary to avoid the application of porcelain alloys with Be element. Co-Cr alloy with better biocompa-tibility possesses much broader prospect in the field of dental restoration.关键词
烤瓷合金/电化学腐蚀/耐蚀性Key words
porcelain alloy/ electrochemical corrosion/ corrosion resistance分类
医药卫生引用本文复制引用
吴芝凯,许胜,黎为,腾劲,李宁..3种非贵金属烤瓷合金的耐蚀性研究[J].华西口腔医学杂志,2011,29(5):485-487,493,4.
