J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (7): 636-641.

• Thin Film and Coatings • Previous Articles     Next Articles

Fabrication and Characterization of Ca-Mg-P Containing Coating on Pure Magnesium

Yanjin Lu1,2), Lili Tan1), Hongliang Xiang2), Bingchun Zhang1), Ke Yang1), Yangde Li3)   

  1. 1) Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    2) School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
    3) Dongguan EONTEC Co., Ltd., Dongguan 523662, China
  • Received:2011-10-28 Revised:2012-02-28 Online:2012-07-28 Published:2012-07-28
  • Contact: ke Yang
  • Supported by:

    the National Natural Science Foundation of China (No. 30970715) and the National Basic Research Program of China (973 Program, No. 2012CB619101)

Abstract: A biodegradable Ca-P coating mainly consisting of β-tricalcium phosphate (β-TCP) was fabricated on pure magnesium via the chemical deposition in a simulated Hank0s solution. The method significantly accelerated the coating formation on magnesium. Moreover, the morphology, phase/chemical composition, the coating formation mechanism as well as degradation behavior in phosphate buffered saline (PBS) solution were investigated. Scanning electron microscopy (SEM) images showed that the coating had three layers and X-ray diffraction (XRD) patterns showed that the coating mainly contained Ca3(PO4)2 and (Ca,Mg)3(PO4)2. Electrochemical test showed that the corrosion current density (Icorr) of the coated Mg was decreased by about
one order of magnitude as compared to that of pure magnesium. The immersion test indicated that the coating could obviously reduce the degradation rate.

Key words: Magnesium,  β-tricalcium phosphate (β-TCP), Biodegradation, Chemical deposition