石墨烯/锌基复合材料在模拟体液中的腐蚀行为  

Corrosion Behavior of Graphene/Zinc Matrix Composites in Simulated Body Fluid

作　　者：张宗奎 彭珊珊 代前飞 樊美 尹胜 赵飞[2] ZHANG Zongkui;PENG Shanshan;DAI Qianfei;FAN Mei;YIN Sheng;ZHAO Fei(Hospital of Guizhou University,Guizhou University,Guiyang 550025,China;College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学校医院,贵阳550025 [2]贵州大学材料与冶金学院,贵阳550025

出　　处：《有色金属工程》2022年第7期50-56,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51571066);贵州省科学技术基金(黔科合基础[2020]1Y197)。

摘　　要：石墨烯增强锌基复合材料具有良好的力学性能,有望作为可降解医用植入材料用于人体骨骼修复。为了明确石墨烯添加对锌基复合材料降解行为的影响,采用电化学方法和浸泡法对比研究了纯锌、石墨烯/锌基复合材料在人体模拟体液(SBF)中的腐蚀行为。结果表明,随着石墨烯含量增加,实验材料的腐蚀速率加快,腐蚀形式以均匀腐蚀为主,在试样边缘和石墨烯附近存在局部腐蚀,腐蚀产物主要为ZnO。0.7%G/Zn基复合材料的腐蚀速率为27μm/a,能够满足可降解骨科植材料的要求。纯锌和G/Zn基复合材料在模拟体液浸泡过程中环境pH值比较稳定,保持在7.1~7.9。Graphene-reinforced zinc matrix composites have excellent mechanical properties and are expected to be used as degradable medical implant materials for human bone repair.To clarify the effect of graphene addition on the degradation behavior of Zn matrix composites,electrochemical methods and immersion method was used to compare the corrosion behavior of pure zinc and graphene/zinc matrix composites in human simulated body fluid(SBF).The results show that with the increase of graphene addition,the corrosion rate of the test material is accelerated,the corrosion form is mainly uniform corrosion.There is local corrosion at the edge of the sample and near the graphene and the corrosion product is mainly ZnO.The corrosion rate of 0.7%G/Zn matrix composites is 27μm/a,which can meet the requirements of degradable orthopaedic implant materials.The environmental pH values of pure zinc and G/Zn matrix composites are relatively stable in the process of immersion in simulated body fluid,and remains at 7.1—7.9.

关 键 词：锌基复合材料 石墨烯 显微组织 腐蚀行为 

分 类 号：TB331[一般工业技术—材料科学与工程]