【摘要】 目的评价2种镍铬和1种含钛镍铬烤瓷合金试件在人工唾液中的耐腐蚀性能。方法采用电化学极化曲线法测定2种镍铬和1种含钛镍铬烤瓷合金试件的自腐蚀电流密度(Icor)r、极化电阻(Rp)、自腐蚀电位(Ecor)r,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形貌变化,并对数据进行单因素方差分析。结果Bellabond镍铬烤瓷合金的Icorr低于Neotitan含钛镍铬烤瓷合金(P<0.05)及粤海镍铬烤瓷合金(P>0.05);粤海镍铬烤瓷合金Icorr低于Neotitan含钛镍铬烤瓷合金(P>0.05)。Bellabond镍铬烤瓷合金的Rp明显高于粤海镍铬烤瓷合金(P<0.05)及Neotitan含钛镍铬烤瓷合金(P<0.05);粤海镍铬烤瓷合金试件的Rp高于Neotitan含钛镍铬烤瓷合金(P>0.05)。Bellabond镍铬烤瓷合金的Ecorr低于粤海镍铬烤瓷合金(P>0.05)及Neotitan含钛镍铬烤瓷合金(P>0.05);Neotitan含钛镍铬烤瓷合金的Ecorr高于粤海镍铬烤瓷合金(P>0.05)。FSEM显示,Bellabond镍铬烤瓷合金表面腐蚀较粤海镍铬烤瓷合金和Neotitan含钛镍铬烤瓷合金轻微。结论Bellabond镍铬烤瓷合金的耐腐蚀性较粤海镍铬烤瓷合金和Neotitan含钛镍铬烤瓷合金优良,Neotitan含钛镍铬烤瓷合金耐腐蚀性与粤海镍铬烤瓷合金无明显差异。更多还原

【Abstract】 Objective To evaluate the corrosion resistance of two kinds of Ni-Cr alloy and Neotitan Ni-Cr-Ti alloy. Methods Electrochemical methods were used to measure the self-corrosion current density(Icor)r,polariza-tion resistance(Rp) and self-corrosion potential(Ecor)r of three alloys. And the polarization curves of the three alloys were recorded at the same time. Field scanning electron microscope(FSEM) was used to observe the corro-sion in the surface of the three alloys. One-way ANOVA with SPSS 11.0 software package was used for statistical analysis. Results The Icorr of Bellabond Ni-Cr alloy was lower than that of Neotitan Ni-Cr-Ti alloy(P<0.05) and Yuehai Ni-Cr alloy(P>0.05). The Icorr of Yuehai Ni-Cr alloy was lower than that of Neotitan Ni-Cr-Ti alloy (P>0.05). The Rp of Bellabond Ni-Cr alloy was higher than that of Yuehai Ni-Cr alloy(P<0.05) and Neotitan Ni-Cr-Ti alloy(P<0.05). The Rp of Yuehai Ni-Cr alloy was higher than that of Neotitan Ni-Cr-Ti alloy(P>0.05). The Ecorr of Bellabond Ni-Cr alloy was lower than that of Yuehai Ni-Cr alloy(P>0.05) and Neotitan Ni-Cr-Ti alloy(P>0.05). The Ecorr of Neotitan Ni-Cr-Ti alloy was higher than that of Yuehai Ni-Cr alloy(P>0.05). FSEM showed that the corrosion in the surface of Bellabond Ni-Cr alloy was slighter than that of Yuehai Ni-Cr alloy and Neotitan Ni-Cr-Ti alloy. Conclusion The corrosion resistance of Bellabond Ni-Cr alloy is better than that of Yuehai Ni-Cr and Neotitan Ni-Cr-Ti alloy. The corrosion resistance of Neotitan Ni-Cr-Ti alloy had no difference compared with that of Yuehai Ni-Cr alloy.更多还原