中文摘要：

采用光学显微镜、扫描电镜、浸泡质量损失和拉伸测试等手段研究了轧制方式（常规轧制和一道次高应变速率轧制）对镁合金（纯镁，Mg-4Zn，Mg-4Zn-0．3Ca和ZK60）在Hank’s溶液中腐蚀行为的影响．结果表明：与常规轧制态相比，高应变速率轧制态镁合金在长时间浸泡过程中平均腐蚀速率较低，抗拉强度下降幅度较小，耐腐蚀性能明显提高，可归因于晶粒细化、再结晶程度较高、孪晶较少和残余第二相相对粗大等；轧制态合金中第二相较少且较细小，表现为相对均匀的丝状腐蚀．

英文摘要：

The effects of rolling mode （conventional rolling and high strain-rate rolling in a single pass） on bio- corrosion behavior of magnesium alloys （ZK60, Mg-4Zn-0. 3Ca, Mg-4Zn and pure Mg） were investigated by optical microscope （OM）, scanning electron microscope （SEM）, mass loss of immersion testing and tensile testing. The re- suits showed that magnesium alloy prepared by high strain-rate rolling exhibited lower average corrosion rate and re- duced slightly in ultimate tensile strength, compared with the counterpart prepared by conventional rolling. Mean- while, better corrosion resistance was also exhibited, which could be attributed to the grain refinement, higher DRX extent, fewer twins, and relatively coarse remained second phases. The as-rolled alloys also exhibited a uniform fili- form corrosion due to the lower fraction and finer size of the second phase.