镁基纳米复合材料在模拟体液中的腐蚀行为  

Corrosion behavior of nagnesium nanocomposite in simulated body fluid

作　　者：王晓伟[1] 陈民芳[1] 王坤[1] 赵锐[1] 刘德宝[1] 魏军 

机构地区：[1]天津理工大学材料科学与工程学院,天津300191 [2]新加坡制造技术研究所,新加坡089537

出　　处：《功能材料》2007年第A05期1786-1788,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目（50471048）

摘　　要：以AZ80A市售镁合金为参照，研究了镁基纳米复合材料镁，即：碳纳米管（Mg／CNT）复合材料及氧化镁（Mg／MgO）纳米复合材料在模拟体液中的腐蚀行为．浸泡过程中测量溶液的pH值变化，在浸泡1、4、8、10、20和30d后计算其腐蚀速率，并通过XRD分析腐蚀产物成分．结果显示：Mg／MgO纳米复合材料比Mg／CNT复合材料耐腐蚀，Mg／CNT复合材料在4d时已经腐蚀完，AZSOA型镁舍金最耐腐蚀。三者的腐蚀产物成分基本相同，均为Mg2CI（0H）3-4H2O及少量的MgCl2.The corrosion behavior of magnesium nanocomposite which contain Mg/CNT nanocomposite and Mg/MgO nanocomposite in simulated body fluid were investigated compared to the commercial magnesium alloy （AZ80A）. The pH values of the SBF solutions immersed samples were measured. The corrosion rates were calculated After 1,4,8,10,20 and 30 days. And the corrosion products were analyzed by the X-ray diffraction. The results showed that the Mg/MgO nanocomposite was more corrosion resistant than the Mg/CNT nanocomposite. Only after immersed in SBF for 4 days, Mg/CNT nanocomposite was disappeared. And the alloy AZSOA was the most corrosion resistant in the three kinds of materials. The corrosion products of all the three are the same, namely： a large amount of Mg2Cl（OH）3.4H2OMgCl2 and a small quantity of MgCl2.

关 键 词：镁基纳米复合材料 腐蚀 模拟体液 

分 类 号：TB383[一般工业技术—材料科学与工程] O614.22[理学—无机化学]