钛硅涂层对钴铬合金耐腐蚀性能的影响

Effects of TiSi coating on corrosion resistance of dental Co-Cr alloy

目的:研究钛硅(TiSi)涂层对牙科钴铬合金(CoCr)耐腐蚀性能的影响。方法:选用临床常用的CoCr合金,制作成10mm×10mm×3mm规格的试件,运用溶胶-凝胶法在其表面涂层钛硅。将涂层前、后的试件浸泡在人工唾液中,利用失重法计算材料的腐蚀速度,并运用ICP-AES等离子体发射光谱仪分析钴铬合金钛硅涂层前、后离子释放量的差异,采用SAS8.0软件包对数据进行统计学分析。结果:失重法实验发现,钛硅涂层前的腐蚀速度为0.163g·m-2·h-1;涂层后为0.138 g·m-2·h-1,运用AES技术分析钴铬合金的元素释放量(g·m-2),涂层前镍为7.728582657、钴为0.008801153、铬为0.306195965、硅为0.194851978;而涂层后,镍为4.745189808、钴为0.004718889、铬为0.153195362、硅为0.778406136,镍、钴、铬的元素释放量在涂层后减少。结论:硅钛涂层能提高钴铬合金的耐腐蚀性能。

PURPOSE：To investigate the effect of titanium-silicon（TiSi） coating on corrosion resistance of dental CoCr alloy.METHODS： The commonly used CoCr alloy was cast into 10mm×10mm×3mm specimen in size.Then the specimen was coated with TiSi on the surface by sol-gel method.The specimens were immersed in artificial saliva.Weight loss method was used to analyze corrosion rate.Element analysis using Auger Electron Spectroscopy（AES） was performed to compare the content of element before and after coating of TiSi in artificial saliva.SAS8.0 software package was used for statistical analysis.RESULTS： By weight lost method,before and after coating TiSi,the corrosive rate was 0.163 g·m-2·h-1 and 0.138 g·m-2·h-1 respectively.With AES,in Co-Cr alloy not coating TiSi,atomic concentration（g·m-2） of Ni,Co,Cr and Si was 7.728582657,0.008801153,0.306195965 and 0.194851978,respectively.After coating Ti-Si,the content of Ni,Co,Cr and Si and 4.745189808,0.004718889,0.153195362 and 0.778406136,respectively.The release rate of the Ni,Co,cr were decreased after coating.CONCLUSION： TiSi coating can improve corrosion resistance of CoCr alloy.Supported by Research Fund of Science and Technology Commission of Shanghai Municipality（08DZ2271100） and Shanghai Leading Academic Discipline Project（S30206）.