通过真空熔炼获得了不同Ca含量的ZM61镁合金,利用光学金相显微镜、扫描电镜和X射线衍射仪分析了其铸态组织结构,并通过37℃下SBF溶液中的析氢试验和电化学测试,研究Ca含量对铸态ZM61合金在仿生环境中腐蚀行为的影响.结果表明,随着Ca的加入,合金的晶粒尺寸细化；Ca在合金中主要存在于Ca2 Mg6 Zn3析出相中,当Ca含量达到0.5％(质量分数,下同)时,这种析出物在晶界形成连续网状；随着Ca含量的增加,合金耐腐蚀性呈先增后减的趋势,Ca含量为0.5％时,合金的耐腐蚀性最佳.
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