材料科学与技术 ›› 2018, Vol. 34 ›› Issue (10): 1756-1764.DOI: 10.1016/j.jmst.2018.02.013

所属专题: 2017-2018年Mg合金专题 Biomaterials 2018

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  • 收稿日期:2017-08-15 修回日期:2017-09-16 接受日期:2017-09-29 出版日期:2018-10-05 发布日期:2018-11-01
  • 作者简介:

    1These authors contributed equally to this work.2Permanent address: Department of Chemical and Biomolecular Engineering,Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH45701, USA.

Effect of corrosion product films on the in vitro degradation behavior of Mg-3%Al-1%Zn (in wt%) alloy in Hank’s solution

B.J. Wanga, D.K. Xubc(), J.H. Dongc(), W. Kebc   

  1. aSchool of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
    bCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    cEnvironmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2017-08-15 Revised:2017-09-16 Accepted:2017-09-29 Online:2018-10-05 Published:2018-11-01

Abstract:

Through investigating the corrosion behavior of an as-extruded Mg-3wt%Al-1wt%Zn (AZ31) alloy in a simulated physiological fluid of Hank’s solution, it demonstrates that the corrosion process was dependent on the immersion time. Further analyses revealed that the highest corrosion resistance could be obtained at 24 h due to the formation of a compact layer of corrosion products on the sample surface. With increasing the immersion time to up to 48 h, the thickness of surface films increased gradually but obvious de-bonding of such film from the substrate could take place, resulting in a certain resilience of the overall corrosion resistance.

Key words: Magnesium, Surface layer, Corrosion product, Interface