陈志永

教授 博士生导师 硕士生导师

入职时间:1999-08-01

所在单位:材料科学与工程学院

学历:博士研究生毕业

办公地点:湖南省长沙市岳麓区中南大学校本部化学楼205#

性别:男

联系方式:czysh@netease.com

学位:博士学位

在职信息:在职

毕业院校:中南大学

   
当前位置: 中文主页 >> 论文成果

The effect of Sr addition on the microstructure and corrosion behaviour of a Mg-Zn-Ca alloy

发布时间:2022-06-10

点击次数:

DOI码:10.1016/j.surfcoat.2022.128328

发表刊物:Surface & Coatings Technology

关键字:Magnesium alloy; Hydrogen evolution test; Electrochemical impedance spectroscopy; Microstructure characterization

摘要:The application of magnesium alloys is rather limited due to their poor corrosion resistance despite of their promising mechanical properties. Alloying is considered one of the most efficient methods to influence the corrosion susceptibility of Mg alloys either by altering the bulk microstructures or by changing the surface chemistries. In the present study, the effects of Sr addition on the microstructure and corrosion properties of a Mg-Zn-Ca alloy were studied. The microstructure characteristics of the alloys were investigated using optical microscopy, scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy, while the corrosion properties were evaluated by hydrogen collection method and electrochemical techniques including potentiodynamic polarization and electrochemical impedance spectroscopy. The results indicate that Sr addition significantly deteriorates the corrosion performance of the Mg-Zn-Ca alloy mainly by forming more micro-galvanic couples due to the precipitation of the more populous secondary phase particles. The corrosion prod-uct film accumulated on the sample surface marginally affects the corrosion resistance, as their compactness is rather compromised as the immersion time is prolonged.

合写作者:Y.H. Gao*, C.M. Liu, Z.Y. Chen

第一作者:J. Song

论文类型:期刊论文

文献类型:J

卷号:437

页面范围:128328

ISSN号:0257-8972

是否译文:

发表时间:2022-05-15

上一条: A study of high damping capacities and mechanical properties of cast Mg-Gd binary alloys

下一条: Stress-accelerated softening in bulk nanocrystalline Mg-Gd-Y-Zr alloys