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Effect of Microstructure on Corrosion Behavior of Mg-Sr Alloy in Hank's Solution
Dong, Jia-Hui1,2; Tan, Li-Li1; Ren, Yi-Bin1; Yang, Ke1
Corresponding AuthorTan, Li-Li(lltan@imr.ac.cn)
2019-03-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume32Issue:3Pages:305-320
AbstractMg-Sr alloy has been studied as a potential biodegradable material with excellent bioactivity to promote the bone formation. However, its degradation behavior needs to be well controlled to avoid the negative effect, which is important for future application. Therefore in this study, the microstructure and its effect on corrosion behavior of an Mg-1.5Sr alloy were investigated. The microstructures of the alloy under different processing procedures were characterized by both optical and scanning electron microscopes. The corrosion performance was studied in Hank's solution using immersion, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests. The results showed that the grain size and the amount and distribution of beta-Mg17Sr2 had obvious effects on the corrosion behavior of Mg-Sr alloy. The smaller the grain size was, the more the protective surface layer formed on Mg-Sr alloy, and the higher the corrosion resistance was. For the as-cast Mg-Sr alloy, the network-like second phases precipitated along the grain boundaries could not hinder the corrosion due to their own corrosion cracking accelerating the intergranular corrosion. However, the refinement of second phases increased the corrosion resistance of the as-extruded alloy. After solution treatment at 450 degrees C for 5 h, the grains in the alloy did not grow much and beta-Mg17Sr2 phases homogenously distributed in the alloy, resulting in the increase in corrosion resistance. However, after aging treatment, large amount of precipitated second phases increased the galvanic corrosion of the alloy, accelerating the development of corrosion.
KeywordMg-Sr alloy Microstructure Corrosion Extrusion Heat treatment
Funding OrganizationNational Key Research on Development Program of China ; National High Technology Research and Development Program of China ; National Natural Science Foundation of China ; Institute of Metal Research, Chinese Academy of Sciences
DOI10.1007/s40195-018-0750-4
Indexed BySCI
Language英语
Funding ProjectNational Key Research on Development Program of China[2016YFC1101804] ; National High Technology Research and Development Program of China[2015AA033701] ; National Natural Science Foundation of China[81401773] ; National Natural Science Foundation of China[31500777] ; Institute of Metal Research, Chinese Academy of Sciences[2015-ZD01]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000462257400004
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/132526
Collection中国科学院金属研究所
Corresponding AuthorTan, Li-Li
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Dong, Jia-Hui,Tan, Li-Li,Ren, Yi-Bin,et al. Effect of Microstructure on Corrosion Behavior of Mg-Sr Alloy in Hank's Solution[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(3):305-320.
APA Dong, Jia-Hui,Tan, Li-Li,Ren, Yi-Bin,&Yang, Ke.(2019).Effect of Microstructure on Corrosion Behavior of Mg-Sr Alloy in Hank's Solution.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(3),305-320.
MLA Dong, Jia-Hui,et al."Effect of Microstructure on Corrosion Behavior of Mg-Sr Alloy in Hank's Solution".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.3(2019):305-320.
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