模拟人体体液中镁合金的腐蚀行为研究

doi:10.11902/1005.4537.2019.050

中国腐蚀与防护学报

2019, Vol. 39

Issue (6): 463-468 DOI: 10.11902/1005.4537.2019.050

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模拟人体体液中镁合金的腐蚀行为研究

郏义征¹,赵明君²,程世婧³,王保杰²,王硕⁴,盛立远⁵,许道奎⁴(

)

1. 四川建筑职业技术学院博士后创新实践基地德阳 618000
2. 沈阳理工大学环境与化学工程学院沈阳 110159
3. 中国科学院北京 100864
4. 中国科学院金属研究所中国科学院核用材料与安全评价重点实验室沈阳 110016
5. 北京大学深圳研究院人体组织与再生修复深圳重点实验室深圳 518057

Corrosion Behavior of Mg-Zn-Y-Nd Alloy in Simulated Body Fluid

JIA Yizheng¹,ZHAO Mingjun²,CHENG Shijing³,WANG Baojie²,WANG Shuo⁴,SHENG Liyuan⁵,XU Daokui⁴(

)

1. Innovation and Practice Base for Postdoctors, Sichuan College of Architectural Technology, Deyang 618000, China
2. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
3. Chinese Academy of Sciences, Beijing 100864, China
4. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
5. Shenzhen Key Lab Human Tissue Regenerate & Repair, Shenzhen Institute, Peking University, Shenzhen 518057, China

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摘要:

研究了Mg-6Zn-1.2Y-0.8Nd合金样品在Hank's溶液中经预浸泡处理前后的腐蚀行为。结果表明，表面的腐蚀产物对基体可以起到一定的防护作用。经4 h预浸泡处理后，合金表面形成的产物膜较为均匀，对基体的防护作用最佳，其腐蚀电流密度为1.98 μA/cm²。随着预浸泡时间的进一步延长，合金表面形成的腐蚀产物膜增厚，会发生自身开裂或与基体脱落，加剧了局部腐蚀，致使产物膜对基体的腐蚀防护作用明显下降。经48 h预浸泡处理后，合金的腐蚀电流密度增加至3.64 μA/cm²。

关键词 ：镁合金, 生物材料, 产物膜, 局部腐蚀, 浸泡

Abstract：

The corrosion behavior of Mg-6Zn-1.2Y-0.8Nd alloy before and after pre-soaking in Hank's solution was comparatively studied. Results revealed that the surface corrosion products formed during pre-shoaking can protect the substrate from corrosion attack to a certain extent. After pre-soaking for 4 h, the product film formed on the surface was relatively uniform and had the best protective effect on the matrix. The corrosion current density was 1.98 μA/cm². As the pre-soaking time was further extended, the corrosion products film formed on sample surfaces became thicker, and tend to be cracked and detached from the substrate, correspondingly the localized corrosion was accelerated, resulting in the decrease in their protective effect. After pre-soaking for 48 h, the corrosion current density of the alloy increased to 3.64 μA/cm².

Key words： Mg-alloy biomaterial corrosion product film localized corrosion immersion

收稿日期: 2019-04-25

ZTFLH:

TG172.5

基金资助:国家自然科学基金(51701129);国家自然科学基金(51871211);德阳市重点科技支撑项目(2014ZZ051);沈阳理工大学博士后启动基金(10500010006)

通讯作者: 许道奎 E-mail: dkxu@imr.ac.cn

Corresponding author: XU Daokui E-mail: dkxu@imr.ac.cn

作者简介: 郏义征，男，1980年生，副教授

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引用本文:

郏义征, 赵明君, 程世婧, 王保杰, 王硕, 盛立远, 许道奎. 模拟人体体液中镁合金的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 463-468.
JIA Yizheng, ZHAO Mingjun, CHENG Shijing, WANG Baojie, WANG Shuo, SHENG Liyuan, XU Daokui. Corrosion Behavior of Mg-Zn-Y-Nd Alloy in Simulated Body Fluid. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 463-468.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.050 或 https://www.jcscp.org/CN/Y2019/V39/I6/463

图1 Mg-6Zn-1.2Y-0.8Nd合金微观组织的SEM像及W相的EDS结果

图2 不同时间预浸泡处理后Mg-6Zn-1.2Y-0.8Nd合金样品在Hank's溶液中的电化学结果

表1 不同时间预浸泡处理后Mg-6Zn-1.2Y-0.8Nd合金样品极化曲线的拟合结果

图3 在Hank's溶液中经不同时间预浸泡处理后Mg-6Zn-1.2Y-0.8Nd合金样品的表面腐蚀形貌及三维形貌像

图4 在Hank's溶液中预浸泡样品横截面的SEM像和膜层的EDS分析结果

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