Acta Metallurgica Sinica (English Letters)

, Volume 32, Issue 10, pp 1195–1206 | Cite as

Biodegradation Behavior of Coated As-Extruded Mg–Sr Alloy in Simulated Body Fluid

  • Ming-Chun Zhao
  • Ying-Chao Zhao
  • Deng-Feng YinEmail author
  • Shuo Wang
  • Yong-Ming Shangguan
  • Chao Liu
  • Li-Li Tan
  • Ci-Jun Shuai
  • Ke Yang
  • Andrej Atrens


As-extruded Mg–Sr alloy, a kind of promising biodegradable biomedical material, was coated using micro-arc oxidation and also using a phosphate conversion coating. The corrosion behaviors were investigated using Hanks’ solution. The corrosion of the as-extruded Mg–Sr alloy became more serious with increasing immersion time; that is, the corrosion pits became more numerous, larger and deeper. The micro-arc oxidation coating and the phosphate conversion coating were effective in improving the corrosion resistance of the as-extruded Mg–Sr alloy. The micro-arc oxidation coating was much more effective. Moreover, the as-extruded Mg–Sr alloy and the coated as-extruded Mg–Sr alloy exhibited lower corrosion rates than the as-cast Mg–Sr alloy and the corresponding coated as-cast Mg–Sr alloy, indicating that the corrosion properties of the coated samples are dependent on their substrates. The finer microstructure of the substrate of the as-extruded condition corroded much slower. The corrosion resistance of the coated Mg–Sr alloy depended on the coating itself and on the microstructure of the substrate.


Mg alloy Micro-arc oxidation coating Phosphate conversion coating Biodegradation Corrosion resistance 



The study was financially supported by the National Natural Science Foundation of China (No. 51874368).


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Copyright information

© The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Ming-Chun Zhao
    • 1
  • Ying-Chao Zhao
    • 1
  • Deng-Feng Yin
    • 1
    Email author
  • Shuo Wang
    • 1
  • Yong-Ming Shangguan
    • 2
  • Chao Liu
    • 1
  • Li-Li Tan
    • 2
  • Ci-Jun Shuai
    • 1
  • Ke Yang
    • 2
  • Andrej Atrens
    • 3
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina
  2. 2.Institute of Metal ResearchChinese Academy of SciencesShenyangChina
  3. 3.Division of MaterialsThe University of QueenslandBrisbaneAustralia

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