镁合金支架表面复合涂层的制备及耐蚀性能  

Preparation and Corrosion Resistance of Composite Coating on Magnesium Alloy Stent

作　　者：周红欣 ZHOU Hong-xin(Shanghai Kindly Medical Instruments Co.,Ltd.,Shanghai 201803)

机构地区：[1]上海康德莱医疗器械股份有限公司,上海201803

出　　处：《中国医疗器械信息》2023年第9期71-73,169,共4页China Medical Device Information

摘　　要：为提升镁合金支架耐蚀性能,通过优化阳极氧化工艺并采用超疏水处理在镁锌合金支架表面制备复合涂层,观察涂层表面形貌并测试涂层接触角,分析支架耐蚀性能。通过扫描电镜观察涂层孔隙情况。结合电化学与体外浸泡,研究表面处理后镁合金支架的体外降解行为。结果表明,阳极氧化电解液中抑制剂的加入有效减少涂层孔隙率,改善支架耐蚀性能;超疏水处理显著改善涂层表面质量,提高涂层疏水性,超疏水处理组具有最低的腐蚀电流密度和最高的腐蚀电位,且在模拟体液中浸泡20d支架仍能保持完整的表面结构。In order to improve the corrosion resistance of magnesium alloy stent,composite coating was prepared on the surface of magnesium zinc alloy stent by optimizing the anodic oxidation process and using superhydrophobic treatment.The surface morphology of coating was observed and the contact angle of coating was tested to analyze the corrosion resistance of the stent.The porosity of the coating was observed by scanning electron microscope.The in vitro degradation behavior of magnesium alloy stent after surface treatment was studied by electrochemistry and in vitro immersion.The results showed that the addition of inhibitors in the anodic oxidation electrolyte effectively reduced the coating porosity and improved the corrosion resistance of the stent.Superhydrophobic treatment significantly improved the surface quality and hydrophobicity of the coating.The superhydrophobic treatment group had the lowest corrosion current density and the highest corrosion potential,and the stent could still maintain a complete surface structure after soaking in Hank’s for 20 days.

关 键 词：镁合金支架 抑制剂 超疏水处理 耐蚀性 

分 类 号：TG174.21[金属学及工艺—金属表面处理]