摘要
目的在体外模拟口腔环境下,研究液相沉积法制备的纳米二氧化硅(SiO2)涂层对纯钛耐腐蚀性能的影响。方法将16个纯钛试件随机分为对照组、0.1 mol/L硅酸钠溶液组、0.3 mol/L硅酸钠溶液组、0.5 mol/L硅酸钠溶液组。用液相沉积法在实验组纯钛试件表面制备SiO2涂层,用动电位极化曲线法考察各组试件在人工唾液中的腐蚀电位及腐蚀电流密度,同时用X线衍射、能谱分析、扫描电镜等分析涂层表面成分及形貌。结果涂层为非晶态SiO2。各实验组较对照组显著提高了纯钛腐蚀电位,降低了腐蚀电流密度(P<0.05)。0.3 mol/L硅酸钠溶液组耐腐蚀性最好。结论液相沉积法制备的纳米SiO2涂层可提高纯钛在人工唾液中的耐腐蚀性能,硅酸钠溶液的最佳浓度是0.3 mol/L。
Objective To investigate the effects of nanometer silica （ SiO2 ） coating prepared by liquid - phase deposition （LPD） on the corrosion resistance of pure titanium under the condition of simulated oral environment in vitro. Methods Sixteen pure titanium test pieces were randomly divided into four groups（ n = 4） ,i. e. control group,0.1 mol/L,0.3 mol/L, and 0.5 mol/L sodium silicate solution group. LPD method was used to prepare SiO2 coating on the surface of the pure titanium test pieces in those experimental groups. The corrosion potential and corrosion current density of those test pieces in each group within the artificial saliva were measured by potentiodynamic polarization curves. Meanwhile composition and morphous of the coating surface were analyzed by X - ray diffraction, spectrum analysis, and scanning electron microscope. Results The coating consisted of amorphous material SiO2. Their corrosion potential significantly increased and corrosion current density decreased（ P 〈 0.05 ）in the experimental groups compared with those in the control group. The corrosion resistance of the 0.3 mol/L sodium silicate solution group was the best. Conclusion The nanometer SiO2 coating prepared by liquid - phase deposition can improve the corrosion resistance of pure titanium in the artificial saliva. The best concentration of sodium silicate solution is O. 3 mol/L.
出处
《西南国防医药》
CAS
2013年第1期12-15,共4页
Medical Journal of National Defending Forces in Southwest China
基金
南京军区医学科技创新课题面上项目(10MA048)
关键词
纯钛
纳米二氧化硅
液相沉积
涂层
耐腐蚀性
pure titanium
silica
liquid phase deposition
coating
corrosion resistance
