AZ31镁合金表面磁控溅射铁基复合涂层的耐蚀性和生物相容性

Corrosion Resistance and Biocompatibility of Magnetron Sputtering Fe-based Composite Coating on AZ31 Magnesium Alloy

采用射频磁控溅射方法在AZ31镁合金表面制备铁基复合涂层。借助XRD、XPS及SEM对涂层的物相、元素组成和微观形貌进行表征,采用模拟体液浸泡和电化学测试手段检测涂层的耐蚀性。结果显示,相较于AZ31基体,复合涂层AZ31的腐蚀电位提升了约170 mV,腐蚀电流密度则降低了2个数量级。将样品在RPMI1640培养基中的浸提液与人脐静脉内皮细胞(HUVEC)进行共培养,通过CCK-8实验评价其细胞毒性,发现复合涂层AZ31的毒性最小,内皮细胞具有较高的增殖率,铁基复合涂层AZ31镁合金具有良好的耐蚀性和生物相容性。

Fe-based composite coating was prepared on AZ31 magnesium alloy by RF magnetron sputtering.The phase,elemental composition and microstructure of the coating were characterized by XRD,XPS and SEM.The corrosion resistance of the coating was tested by simulated body fluid immersion and electrochemical testing.The results show that compared with AZ31 matrix,the corrosion potential of composite coating AZ31 is increased by about 170 mV,and the corrosion current density is reduced by two orders of magnitude.The extract of the sample in RPMI 1640 medium was cocultured with human umbilical vein endothelial cells(HUVEC),and its cytotoxicity was evaluated by CCK-8 experiment.It was found that the compound coating AZ31 had the least toxicity and the endothelial cells had a high proliferation rate.The iron-based composite coating AZ31 magnesium alloy has good corrosion resistance and biocompatibility.