Mo微合金化对生物医用Mg-Zn合金 微观组织和腐蚀性能的影响

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文章编号： 1672-6987（2024）06-0056-09； DOI： 10.16351/j.1672-6987.2024.06.007

王玮1， 陈克正1*(1. 青岛科技大学 材料科学与工程学院，山东 青岛 266042；

2. 潍坊科技学院 山东省高校设施园艺实验室； 建筑工程学院，山东 潍坊 262700)

摘要： 将微量Mo元素添加到Mg-Zn合金中，采用金属模铸造法制备了Mg-2Zn-03Mo合金，系统研究了铸态Mg-2Zn和Mg-2Zn-03Mo合金的微观组织和腐蚀性能。采用光学显微镜（OM）、扫描电镜（SEM）、X射线衍射（XRD）和能谱（EDS）分析了铸态Mg-2Zn和Mg-2Zn-03Mo合金的微观组织，应用电化学测试和Hank′s溶液（模拟人体体液）静态浸泡测试研究了其耐腐蚀性能。结果表明：铸态Mg-2Zn-03Mo合金由α-Mg基体、少量的MgZn相和MoZn22相组成。与Mg-2Zn合金相比，Mg-2Zn-03Mo合金的晶粒明显细化（100~130 μm到60~80 μm）。添加质量分数03%Mo后Mg-2Zn合金的腐蚀电流密度降低了8923 μA·cm-2，腐蚀速率下降了3793%，说明微量Mo的添加使Mg-Zn合金的耐腐蚀性能得到了显著提高。

关键词： Mg-Zn合金； 腐蚀性能； 微观组织

中图分类号： TG 146.22文献标志码： A

引用格式： 高云，王玮，陈克正.Mo微合金化对生物医用Mg-Zn合金微观组织和腐蚀性能的影响［J］. 青岛科技大学学报(自然科学版), 2024, 45（6）： 56-64.

GAO Yun, WANG Wei, CHEN Kezheng.Molybdenum-induced microstructural changes and associated corrosion resistance of biodegradable Mg-Zn alloy［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2024， 45（6）： 56-64.

Molybdenum-induced Microstructural Changes and Associated Corrosion

Resistance of Biodegradable Mg-Zn Alloy

GAO Yun1,2, WANG Wei1, CHEN Kezheng1

(1.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;

2.Shandong Provincial University Laboratory for Protected Horticulture； College of Civil Engineering,

Weifang University of Science and Technology, Weifang 262700, China)

Abstract: In this paper, a trace amount of Mo element was added to the Mg-Zn alloy, and the Mg-2Zn-03Mo alloy was prepared by the metal mold casting method. The microstructure and corrosion behavior of as-cast Mg-2Zn and Mg-2Zn-03Mo alloys were investigated systematically. The microstructures of the as-cast Mg-2Zn and Mg-2Zn-03Mo alloys were analyzed by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and energy-dispersive spectrum (EDS). The corrosion resistance was studied by electrochemical test and immersion test in Hank′s solution (simulated human body fluids). The results showed that the as-cast Mg-2Zn-03Mo alloys consisted of an α-Mg matrix and a small amount of MgZn phase and MoZn22 phase. Compared with the Mg-2Zn alloy, the grains were refined (100—130 μm to 60—80 μm). The corrosion current of the Mg-2Zn alloy decreased by 8923 μA·cm-2, and the corrosion rate decreased by 3793% with 03% Mo addition, respectively. The addition of Mo effectively improves the corrosion resistance of the Mg-Zn alloy. Therefore, the results can provide theoretical and data support for the subsequent development of Mg-Zn-Mo alloys for biodegradable implants.

Key words: Mg-Zn alloy; corrosion performance; microstructure

收稿日期： 2024-01-11

基金项目： 国家自然科学基金项目 (51472133).

作者简介： 高云（1986—），女，博士研究生．*通信联系人．