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首页> 外文期刊>Materials science & engineering >Effect of Y on the bio-corrosion behavior of extruded Mg-Zn-Mn alloy in Hank's solution
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Effect of Y on the bio-corrosion behavior of extruded Mg-Zn-Mn alloy in Hank's solution

机译：Y对Hank溶液中挤压Mg-Zn-Mn合金生物腐蚀行为的影响

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摘要

The bio-corrosion properties of Mg-Zn-Mn alloys with and without Y in Hank's solution at 37℃ were investigated by using electrochemical test and electrochemical impedance spectra (EIS). The results of open circuit potential (OCP) and polarization tests indicated that Y could reduce the cathodic current density. A passivative stage appeared in the Tafel curve of the Y containing magnesium alloy, indicating that a passivative film was formed on the surface of the Y containing magnesium alloy. EIS results showed that the Y containing alloy had higher charge transfer resistance and film resistance, but lower double layer capacity than the alloy without the Y element. The surface reaction product identification by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) showed that the surface corrosion products were hydroxide and phosphate (Mg_3Ca_3(PO_4)_4) for Mg-Zn-Mn alloy and phosphate (MgNaPO_4) for the Y containing Mg-Zn-Mn alloys. The XPS results also showed that a Y_2O_3 protective film was formed on the surface of the Y containing magnesium alloy which contributed mainly to the low cathodic current density and the high resistance.
机译：通过电化学测试和电化学阻抗谱（EIS），研究了含和不含Y的Mg-Zn-Mn合金在37℃汉克溶液中的生物腐蚀性能。开路电势（OCP）和极化测试的结果表明，Y可以降低阴极电流密度。含Y的镁合金的Tafel曲线中出现钝化阶段，表明在含Y的镁合金的表面上形成了钝化膜。 EIS结果表明，与不含Y元素的合金相比，含Y合金具有更高的电荷转移电阻和膜电阻，但双层容量却更低。通过X射线衍射（XRD）和X射线光电子能谱（XPS）鉴定的表面反应产物表明，Mg-Zn-Mn合金的表面腐蚀产物为氢氧化物和磷酸盐（Mg_3Ca_3（PO_4）_4），磷酸盐（MgNaPO_4） ）用于含Y的Mg-Zn-Mn合金。 XPS结果还表明，在含Y的镁合金表面上形成了Y_2O_3保护膜，这主要是由于低阴极电流密度和高电阻。

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