摘要
目的在模拟口腔环境下,观察烤瓷熔附镍铬合金基底面经烧结后再抛光的电化学腐蚀行为。方法采用恒电位测量极化曲线法,测定经烤瓷烧结再抛光镍铬合金在人工唾液中的自腐蚀电流密度(Icorr)、极化电阻(Rp)与自腐蚀电位(Ecorr),并与未抛光组(对照组)进行比较分析。结果实验组镍铬合金自腐蚀电流密度为0.958μAcm-2,低于对照组4.881μAcm-2(P<0.05);而实验组极化电阻与自腐蚀电位均显著高于对照组(P<0.05)。结论烤瓷熔附镍铬合金经烤瓷烧结后再抛光处理,能明显提高其耐腐蚀性能,降低腐蚀速率。
Objective To evaluate the corrosion behavior of fired Ni-Cr alloy after polishing in artificial saliva.Methods Electrochemical methods were used to measure the self-corrosion current density（Icorr）,polarization resistance（Rp） and self-corrosion potential（Ecorr） of two subjects.And the polarization curves of them were recorded at the same time.Results The Icorr of polished Ni-Cr alloy（0.958μAcm-2） was lower than that of control group（4.881μAcm-2）.However,the Rp（69.10 kΩcm2） and Ecorr（-276.19mv） of polished Ni-Cr alloy was higher than that were not polished（25.05 kΩcm2,-313.25 mv）,（P0.05）.Conclusion The corrosion resistance of fired Ni-Cr alloy after polishing was better than that were not,while the speed of corrosion was lower.
出处
《中国医药指南》
2012年第29期5-6,共2页
Guide of China Medicine
基金
江苏高校优势学科建设工程资助项目(项目编号:2011-137)
关键词
镍铬合金
腐蚀
极化曲线
人工唾液
Ni-CrAlloy
Corrosion
Polarization curve
Artificial saliva
