镁锰钙合金在模拟人体体液中的腐蚀行为研究
杨文婷，宋义全，李泉（ 内蒙古科技大学 材料与冶金学院，内蒙古 包头 014010）
摘要：通过添加锰(Mn)的方法来提高镁(Mg)合金在模拟人体体液(Hank`s模拟体液)环境中的耐腐蚀性。采用熔剂覆盖法炼制了Mg-xMn-0.5Ca(x=0.5；1.0；2.0)合金；实验结果表明，在Hank`s模拟体液中浸泡4天后，Mg-1Mn-0.5Ca合金腐蚀程度最低；交流阻抗谱测试表明，三者交流阻抗谱都由单一容抗弧线组成，浸泡4天后，Mg-1Mn-0.5Ca合金的容抗弧半径最大，说明三种成分的镁合金以Mg-1Mn-0.5Ca合金的耐蚀性最佳。
关键词：镁锰钙合金；模拟人体体液；腐蚀中
图分类号：TG178
The corrosion behavior study of Mg-Mn-Ca alloy in simulation body fluid
Yang Wenting, Song Yi-quan，Li Quan( School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010,China)
Key Words: Mg-Mn-Ca alloy; simulation body fluids;
corrosionAbstract: The corrosion resistance of Mg-Mn-Ca alloy in simulation body fluid was improved by adding trace amount of Mn. The corrosion degree of Mg-xMn-0.5Ca(x=0.5；1.0；2.0)alloy was studied ,among which, Mg-1Mn-0.5Ca has the lowest degree of corrosion after being soaked for 4 days, with 1% Mn left ; the AC impedance spectroscopy test in simulation human body fluid shows that AC impedance spectroscopy is composed of single capacitive loops.After soaking the Mg alloys for 4 days, the capacitive loop of Mg-1Mn-0.5Ca with 1% Mn is the highest，indicating it as the best one for corrosion resistance among the Mg alloys of three compositions .