中文摘要：

为了改善Mg-Zn二元合金的耐腐蚀性能,制备了Sr含量分别为0.2%、0.4%、0.6%和1.0%的Mg-4Znx Sr三元镁合金。采用光学显微镜、X射线衍射仪和配备有X射线光电子能谱仪的扫描电子显微镜观察合金的微观组织与相组成,采用失重实验研究合金在模拟体液中的腐蚀性能。采用电化学测试方法测试合金在模拟体液中的极化曲线。结果表明,Sr含量为0.2%的合金腐蚀速率最小,自腐蚀电位最高,腐蚀方式为均匀腐蚀。

英文摘要：

In order to improve the corrosion property of Mg-Zn binary alloy, Sr was added to make Mg-4Zn- xSr tenary alloy with amount of 0.2,0.4,0.6 and 1.0% respectively. The microstructures and phase compositions of the alloys were observed using optical microscopy（OM）,X-ray diffraction （XRD）and scanning electron microscope（SEM） equipped with energy dispersive X-ray spectroscopy. The biocorrosion properties of alloys in simulated body fluid were elevated using the mass loss experiments. Potentiodynamic polarization curves of alloy in SBF were conducted by electrochemical method. It was found that the corrosion rate was the lowest and corrosion potential was the highest with 0.2% Sr content, and the corrosion mode of the alloy in SBF is uniform corrosion.