摘要
目的比较机械抛光、化学抛光和电解抛光对纯钛铸件表面耐腐蚀性的影响。方法2008年11月至2009年3月于哈尔滨工业大学理学院实验室将30个钛铸件随机分为机械抛光组、化学抛光组和电解抛光组,每组10个。机械抛光组:在金相试样抛光机上抛光;化学抛光组:置于化学抛光液中抛光;电解抛光组:进行电解抛光处理。然后在人工唾液中,运用电化学方法测量试件的自腐蚀电位(Ecor)、极化电阻(Rp)、自腐蚀电流密度(Icorr)。应用扫描电镜观察试件表面腐蚀前后的形态变化。结果化学抛光组的Ecorrr、Icorr值均高于电解抛光组(P<0.01),低于机械抛光组(P<0.01);而Rp值则低于电解抛光组(P<0.01),高于机械抛光组(P<0.01)。扫描电镜观察表明,机械抛光组试件表面有明显的腐蚀痕迹,化学抛光组试件表面有轻微的腐蚀痕迹,电解抛光组试件表面无明显的腐蚀痕迹。结论应用电解抛光法处理的钛铸件,其表面耐腐蚀性明显提高,本电解抛光液具有临床应用价值。
Objective To exaluate the influence of mechanic polishing,chemical polishing and electrolytic polishing on the anticorrosion of surface film of cast pure titanium.Methods Thirty pure titanium specimen were prepared and randomly divided into three groups,then different surface polishing was made to each group separately.An electrochemical method was used in the measurement of corrosion potential（Ecorr）,polarization resistance（Rp） and corrosion current density（Icorr） of the three groups.Scanning electron microscope（SEM） was used to confirm the surface change of test samples.Results The results showed that the Ecorr,Rp and Icorr of three groups had significant difference（P 0.01）.SEM results showed that the corrosive marks on the surface of mechanic polishing group were evident and those of mechanic polishing group were not very evident.There were not corrosive marks on the surface of electrolytic polishing group.Conclusion The anticorrosion of surface film of pure titanium increases with the electrolytic solution,and has clinical applicatory value.
出处
《中国实用口腔科杂志》
CAS
2010年第2期113-115,共3页
Chinese Journal of Practical Stomatology
关键词
纯钛
机械抛光
化学抛光
电解抛光
耐腐蚀性
pure titanium
mechanic polishing
chemical polishing
electrolytic polishing
anticorrosion
