【摘要】 目的:评价钴铬、镍铬、含钛镍铬烤瓷合金在人工唾液中的耐腐蚀性能。方法:采用动电位极化曲线法测定钴铬、镍铬、含钛镍铬烤瓷合金试件的自腐蚀电流密度、极化电阻、自腐蚀电位,并得出3种合金的极化曲线。应用场发射扫描电子显微镜(FSEM),观察实验前、后试件表面的形貌变化。采用SPSS11.0软件包对数据进行单因素方差分析。结果:钴铬合金试件自腐蚀电流密度显著低于镍铬合金(P<0.05)及含钛镍铬合金(P<0.05);含钛镍铬合金试件自腐蚀电流密度低于镍铬合金(P<0.05)。钴铬合金试件的极化电阻显著高于镍铬合金(P<0.05)及含钛镍铬合金(P<0.05);含钛镍铬合金试件的极化电阻明显高于镍铬合金(P<0.05)。钴铬合金试件的自腐蚀电位高于镍铬合金(P<0.05)及含钛镍铬合金(P>0.05);含钛镍铬合金试件的自腐蚀电位高于镍铬合金(P>0.05)。FSEM显示,钴铬合金试样表面腐蚀较镍铬合金及含钛镍铬合金轻微。结论:钴铬烤瓷合金的耐腐蚀性优于镍铬烤瓷合金及含钛镍铬烤瓷合金,含钛镍铬烤瓷合金耐腐蚀性不及镍铬烤瓷合金。更多还原

【Abstract】 PURPOSE:To evaluate the corrosion resistance of Co-Cr,Ni-Cr and Ni-Cr-Ti alloy in artificial saliva.METHODS:Electrochemical methods were used to measure the self-corrosion potential(Ecorr),self-corrosion current density(Icorr)and polarization resistance(Rp)of three alloys .And the polarization curves of the three alloys were recorded too.One-way ANOVA with SPSS 11.0 software package was used for statistical analysis.RESULTS:The Icorr of Co-Cr alloy was significantly lower than that of Ni-Cr alloy(P<0.05)and Ni-Cr-Ti alloy(P<0.05).The Icorr of Ni-Cr-Ti alloy was significantly lower than that of Ni-Cr alloy(P<0.05).The Rp of Co-Cr alloy was significantly higher than that of Ni-Cr alloy(P<0.05)and Ni-Cr-Ti alloy(P<0.05).The Rp of Ni-Cr-Ti alloy was significantly higher than that of Ni-Cr alloy(P<0.05).The Ecorr of Co-Cr alloy was significantly higher than that of Ni-Cr alloy(P<0.05)and Ni-Cr-Ti alloy(P<0.05).The Ecorr of Ni-Cr-Ti alloy was higher than that of Ni-Cr alloy but without significant difference(P>0.05).CONCLUSIONS:The corrosion resistance of Co-Cr alloy is better than that of Ni-Cr and Ni-Cr-Ti alloy.The corrosion resistance of Ni-Cr-Ti alloy is worse than that of Ni-Cr alloy.更多还原