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中国腐蚀与防护学报  2020, Vol. 40 Issue (4): 351-357    DOI: 10.11902/1005.4537.2019.113
  研究报告 本期目录 | 过刊浏览 |
固溶处理制度对挤压态Mg-Zn-Y-Nd镁合金在模拟体液中腐蚀和析氢行为的影响规律研究
郏义征1, 王保杰2, 赵明君2, 许道奎3()
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
Effect of Solid Solution Treatment on Corrosion and Hydrogen Evolution Behavior of an As-extruded Mg-Zn-Y-Nd Alloy in an Artificial Body Fluid
JIA Yizheng1, WANG Baojie2, ZHAO Mingjun2, XU Daokui3()
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. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
全文: PDF(4253 KB)   HTML
摘要: 

结合电化学测试、析氢实验和腐蚀形貌观察，对比研究了固溶处理前后挤压态Mg-6Zn-1.2Y-0.8Nd 镁合金样品在Hank's溶液中的腐蚀行为。结果表明，经475 ℃固溶4 h (T4) 后，经不同预浸泡时间处理后合金样品的抗腐蚀能力均得到了提升。当预浸泡时间少于24 h时，热处理前后合金样品的抗腐蚀能力均随着浸泡时间的延长而提升。然而，当预浸泡时间为48 h时，两种处理态样品的抗腐蚀能力均有所降低。析氢实验结果表明，T4态合金样品的析氢速度是挤压态样品的0.75倍。对比固溶处理前后合金样品的腐蚀形貌，可见挤压态合金样品表面的腐蚀情况较为严重，且腐蚀坑明显较多较深。
关键词 ： 镁合金,  预浸泡,  析氢,  点蚀坑,  固溶处理    
Abstract：

The corrosion behavior of an as-extruded Mg-6Zn-1.2Y-0.8Nd alloy before and after solid solution (T4) treatment was assessed comparatively in Hank's solution by means of hydrogen evolution examination, electrochemical tests and corrosion morphologies characterization. The results showed that after being solution treated at 475 ℃ for 4 h, the corrosion resistance of the alloy was improved. In addition, when the pre-soaking time was less than 24 h, the corrosion resistance of the alloy before and after T4 treatment all increased with the pre-soaking time. However, when the pre-soaking time was 48 h, the corrosion resistance of the differently treated alloys was reduced. The hydrogen evolution data showed that the hydrogen evolution rate of the T4 alloy was 0.75 times as high as that of the as-extruded ones. As the corrosion morphology of different treated alloys was compared, it can be seen that the corrosion attack on the surface of as-extruded alloy was much severe with deeper corrosion pits.
Key words： magnesium alloy    pre-soaking    hydrogen evolution    pitting    solid solution treatment
收稿日期: 2019-07-26     
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，博士
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引用本文:

郏义征, 王保杰, 赵明君, 许道奎. 固溶处理制度对挤压态Mg-Zn-Y-Nd镁合金在模拟体液中腐蚀和析氢行为的影响规律研究[J]. 中国腐蚀与防护学报, 2020, 40(4): 351-357.
Yizheng JIA, Baojie WANG, Mingjun ZHAO, Daokui XU. Effect of Solid Solution Treatment on Corrosion and Hydrogen Evolution Behavior of an As-extruded Mg-Zn-Y-Nd Alloy in an Artificial Body Fluid. Journal of Chinese Society for Corrosion and protection, 2020, 40(4): 351-357.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.113      或      https://www.jcscp.org/CN/Y2020/V40/I4/351

图1  固溶处理前后挤压态Mg-6Zn-1.2Y-0.8Nd合金的微观形貌
图2  固溶处理前后Mg-6Zn-1.2Y-0.8Nd合金样品在Hank's溶液中的析氢曲线
图3  不同时间预浸泡后Mg-6Zn-1.2Y-0.8Nd合金样品在Hank's溶液中的动电位极化曲线
ConditionPre-immersion time / hEcorrVSCEIcorr10-3 mA·cm-2
Before T40-1.574±0.157.9±0.5
After T40-1.572±0.154.8±0.2
Before T42-1.581±0.205.0±0.3
After T42-1.624±0.153.6±0.2
Before T44-1.525±0.104.1±0.3
After T44-1.625±0.153.1±0.3
Before T48-1.612±0.103.4±0.3
After T48-1.606±0.152.0±0.1
Before T424-1.620±0.252.2±0.2
After T424-1.568±0.151.2±0.1
Before T448-1.633±0.102.9±0.1
After T448-1.584±0.151.9±0.1
表1  固溶处理前后挤压态Mg-6Zn-1.2Y-0.8Nd合金样品极化曲线的拟合结果
图4  在Hank's溶液中经不同时间预浸泡处理后挤压态Mg-6Zn-1.2Y-0.8Nd合金样品的表面腐蚀形貌及三维高低差照片
图5  在Hank's溶液中经不同时间预浸泡处理后T4态Mg-6Zn-1.2Y-0.8Nd合金样品的表面腐蚀形貌及三维高低差照片
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