CAJ | 학술논문

目的在不同质量分数氯化钠溶液中研究3种铬合金表面钝化膜的性能改变,分析其抗腐蚀性能,以期为铬合金的临床应用提供参考.．分别配制氯化钠质量分数为1%、2%、3%的人工唾液,分别以钴铬合金、镍铬合金和含钛镍铬合金(各5个)为工作电极,施加0.1 V钝化电位600 s形成钝化膜.分析3种铬合金的电压-电容关系曲线和时间-电流对数曲线,分析不同氯离子质量分数对3种铬合金表面钝化膜的半导体特性及致密性的影响.结果 3种铬合金钝化膜均呈n型半导体特性;随着氯化钠质最分数的增大,3种铬合金钝化膜的载流子密度均增大,当氯化钠质量分数为3%时镍铬合金、钴铬合金和含钛镍铬合金的载流子密度分别增至3.71×10～8、2.34×10～9和7.66×10～9/cm～3,时间-电流对数曲线斜率随之减小,钝化膜稳定性和致密性降低.结论在高氯离子环境中3种铬合金的抗腐蚀性能均降低,严重影响修复体的使用寿命.
목적 재불동질량분수록화납용액중연구3충락합금표면둔화막적성능개변,분석기항부식성능,이기위락합금적림상응용제공삼고.． 분별배제록화납질량분수위1%、2%、3%적인공타액,분별이고락합금、얼락합금화함태얼락합금(각5개)위공작전겁,시가0.1 V둔화전위600 s형성둔화막.분석3충락합금적전압-전용관계곡선화시간-전류대수곡선,분석불동록리자질량분수대3충락합금표면둔화막적반도체특성급치밀성적영향.결과 3충락합금둔화막균정n형반도체특성;수착록화납질최분수적증대,3충락합금둔화막적재류자밀도균증대,당록화납질량분수위3%시얼락합금、고락합금화함태얼락합금적재류자밀도분별증지3.71×10～8、2.34×10～9화7.66×10～9/cm～3,시간-전류대수곡선사솔수지감소,둔화막은정성화치밀성강저.결론 재고록리자배경중3충락합금적항부식성능균강저,엄중영향수복체적사용수명.
Objective To investigate the properties of passive film of three Cr alloys and to analyze their corrosion resistance in the artificial saliva with different NaCl mass fraction in vitro.Methods Artificial saliva with 1%,2% and 3% NaCl mass fraction was prepared.Cobalt-chromium alloy.nickelchromium alloy and Ti-Ni-Cr alloy were employed as the working electrode in the artificial saliva.Semiconductor properties of passive film on Cr alloy was analyzed by Mott-Schottky plots.In addition,the factors which affect the semi-conductive compact characteristic of the passive film was also discussed.Results The passive film exhibits n-type semi-conductive characters.With the increasing of NaCl mass fraction,the carrier density of the Cr alloys also increased.The carrier density of the cobalt-chromium alloy.nickelchromium alloy and Ti-Ni-Cr alloy are 3.71×10～8,2.34×10～9,and 7.66×10～9/cm～3 respectively.This decreases its donor density and its film stability.Conclusions When exposed to saliva environment with high concentration of chlorine ion,corrosion resistance of the three types of cr alloys decrease.This will reduce the service life of Cr alloy prosthesis.