CAJ | 학술논문

目的：观察纯钛表面镀制氮化钛薄膜后在不同氟质量浓度人工唾液中的耐腐蚀性。方法：用动电位极化技术测试对照组和镀膜组纯钛在氟质量浓度为0、500、2000mg/L的人工唾液中的自腐蚀电流密度和自腐蚀电位，扫描电镜观察实验面的表面形貌，对结果进行比较分析。结果：对照组和镀膜组纯钛在三种氟质量浓度中的自腐蚀电流密度分别为1.53±0.23、2.29±0.21、4.13±0.19和0.26±0.01、0.32±0.01、0.66±0.03μA，自腐蚀电位分别为-0.93±0.07、-0.89±0.11、-0.57±0.05和-0.54±0.02、-0.56±0.03、-0.50±0.03 V。随氟质量浓度的增加对照组和镀膜组纯钛的自腐蚀电流密度逐渐增大，而镀膜后纯钛的自腐蚀电流密度较未镀膜组明显减小(P<0.01)。扫描电镜显示，随氟质量浓度的增加对照组和镀膜组纯钛的表面腐蚀逐渐加重，而镀膜后纯钛较对照组纯钛的表面腐蚀形貌明显减轻。结论：不断增加的氟浓度使对照组和镀膜组的耐腐蚀性逐渐下降，而脉冲电弧离子镀氮化钛薄膜使纯钛的耐腐蚀性增强。
목적：관찰순태표면도제담화태박막후재불동불질량농도인공타액중적내부식성。방법：용동전위겁화기술측시대조조화도막조순태재불질량농도위0、500、2000mg/L적인공타액중적자부식전류밀도화자부식전위，소묘전경관찰실험면적표면형모，대결과진행비교분석。결과：대조조화도막조순태재삼충불질량농도중적자부식전류밀도분별위1.53±0.23、2.29±0.21、4.13±0.19화0.26±0.01、0.32±0.01、0.66±0.03μA，자부식전위분별위-0.93±0.07、-0.89±0.11、-0.57±0.05화-0.54±0.02、-0.56±0.03、-0.50±0.03 V。수불질량농도적증가대조조화도막조순태적자부식전류밀도축점증대，이도막후순태적자부식전류밀도교미도막조명현감소(P<0.01)。소묘전경현시，수불질량농도적증가대조조화도막조순태적표면부식축점가중，이도막후순태교대조조순태적표면부식형모명현감경。결론：불단증가적불농도사대조조화도막조적내부식성축점하강，이맥충전호리자도담화태박막사순태적내부식성증강。
Objective:To investigate the effects of TiN film by pulsed bias arc ion plating technique on the corrosion resistance of pure titanium in the artificial saliva with different fluoride concentrations. Methods: Potentiodynamic polarization technique was used to measure the current density of corrosion (Icorr) and the electric potential of corrosion (Ecorr) of untreated and TiN-coated pure titaniums in the artificial saliva with the concentrations of 0, 500, 2000 mg/L fluoride.After the electrochemical experiment, the microstructure was observed by scanning electron microscope (SEM). Results: The values of Icorrs of untreated and TiN-coated titanium were 1.53 ±0.23, 2.29 ±0.21, 4.13 ±0.19 and 0.26±0.01, 0.32±0.01, 0.66±0.03μA in different fluoride concentrations , respectively .The values of Ecorrs were-0.93 ±0.07, -0.89 ±0.11, -0.57 ±0.05 and -0.54 ±0.02, -0.56 ±0.03, 0.50 ±0.03V respectively.The Icorrs of TiN-coated group were significantly lower than that of control group (P<0.01).The Icorrs significantly increased with the increasing of fluoride concentrations (P<0.01).The Ecorrs of TiN-coated were significantly higher than that of control group (P<0.01). The observation of SEM showed that the microstructure in the pure titanium after corrosion was much severely than that in TiN-coated titanium.The surfaces of pure titanium were damaged by corrosion with increasing of fluoride concentrations. Conclusion: The increase of fluoride concentrations could weaken the corrosion resistance of both untreated and TiN-coated pure titanium, but pulsed bias arc ion plated TiN coating might significantly increase the corrosion resistance of pure titanium.