In vitro corrosion behaviour of Mg alloys in a phosphate buffered solution for bone implant application

  • Liping Xu
  • Erlin ZhangEmail author
  • Dongsong Yin
  • Songyan Zeng
  • Ke Yang


The corrosion behaviour of Mg–Mn and Mg–Mn–Zn magnesium alloy in a phosphate buffered simulated body fluid (SBF) has been investigated by electrochemical testing and weight loss experiment for bone implant application. Long passivation stage and noble breakdown potential in the polarization curves indicated that a passive layer could be rapidly formed on the surface of magnesium alloy in the phosphate buffered SBF, which in turn can protect magnesium from fast corrosion. Surfaces of the immersed magnesium alloy were characterized by SEM, EDS, SAXS and XPS. Results have shown that Mg–Mn and Mg–Mn–Zn alloy were covered completely by an amorphous Mg-containing phosphate reaction layer after 24 h immersion. The corrosion behaviour of magnesium alloys can be described by the dissolving of magnesium through the reaction between magnesium and solution and the precipitating of Mg-containing phosphate on the magnesium surface. Weight loss rate and weight gain rate results have indicated that magnesium alloys were corroded seriously at the first 48 h while Mg-containing phosphate precipitated fast on the surface of magnesium alloy. After 48–96 h immersion, the corrosion reaction and the precipitation reaction reach a stable stage, displaying that the phosphate layer on magnesium surface, especially Zn-containing phosphate layer could provide effective protection for magnesium alloy.


Magnesium Alloy Energy Dispersive Spectroscopy Simulated Body Fluid Immersion Time Reaction Layer 
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One of authors (Erlin Zhang) would like to thank the financial support from Institute of Metal Research and Chinese Academy of Sciences.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Liping Xu
    • 1
  • Erlin Zhang
    • 1
    Email author
  • Dongsong Yin
    • 2
  • Songyan Zeng
    • 2
  • Ke Yang
    • 1
  1. 1.Institute of Metal ResearchChinese Academy of SciencesShenyangChina
  2. 2.School of Materials Science and EngineeringHarbin Institute of TechnologyHarbinChina

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