华西口腔医学杂志Issue(1)：47-53,7.DOI:10.7518/hxkq.2016.01.010
氟离子对两种不同工艺制作的钴铬合金耐腐蚀性能的影响
Effect of fluoride concentration on the corrosion behavior of cobalt-chromium alloy fabricated by two different technology processes
杨秋霞 1杨瑛 2徐晗 1吴迪 3郭恪1
作者信息
- 1. 九江学院附属口腔医院修复科，九江 332000
- 2. 南昌大学附属口腔医院修复科，南昌 330006
- 3. 九江市第一人民医院口腔颌面外科，九江 332000
- 折叠
摘要
Abstract
Objective This study aims to determine the effect of fluoride concentration on the corrosion behavior of cobaltchromium alloy fabricated by two different technology processes in a simulated oral environment. Methods A total of 15 specimens were employed with selective laser melting (SLM) and another 15 for traditional casting (Cast) in cobalt-chromium alloy powders and blocks with the same material composition. The corrosion behavior of the specimens was studied by potentiodynamic polarization test under different oral environments with varying solubilities of fluorine (0, 0.05%, and 0.20% for each) in acid artificial saliva (pH=5.0). The specimens were soaked in fluorine for 24 h, and the surface microstructure was observed under a field emission scanning electron microscope after immersing the specimens in the test solution at constant temperature. Results The corrosion potential (Ecorr) value of the cobalt-chromium alloy cast decreased with increasing fluoride concentration in acidic artificial saliva. The Ecorr, Icorr, and Rp values of the cobalt-chromium alloy fabricated by two different technology processes changed significantly when the fluoride concentration was 0.20% (P<0.05). The Ecorr, Icorr, and Rp values of the cobalt-chromium alloy fabricated by two different technology processes exhibited a statistically significant difference. The Icorr value of the cobalt-chromium alloy cast was higher than that in the SLM group cobalt-chromium alloy when the fluoride concentration was 0.20% (P<0.05). The Ecorr and Rp values of the cobalt-chromium alloy cast were lower than those of the SLM group cobalt-chromium alloy when the fluoride concentration was 0.20% (P<0.05). Conclusion Fluoride ions adversely affected the corrosion resistance of the cobalt-chromium alloy fabricated by two different technology processes. The corrosion resistance of the cobalt-chromium alloy cast was worse than that of the SLM group cobalt-chromium alloy when the fluoride concentration was 0.20%.关键词
选择性激光熔覆技术/铸造技术/钴铬合金/氟离子/耐腐蚀性Key words
selective laser melting/casting technique/cobalt-chromium alloy/fluoride ions/corrosion resistance分类
医药卫生引用本文复制引用
杨秋霞,杨瑛,徐晗,吴迪,郭恪..氟离子对两种不同工艺制作的钴铬合金耐腐蚀性能的影响[J].华西口腔医学杂志,2016,(1):47-53,7.
