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Controlling the Degradation Rate of Bioactive Magnesium Implants by Electrophoretic Deposition of Akermanite Coating Publisher



Razavi M1, 3, 5, 6 ; Fathi M1, 2 ; Savabi O3 ; Mohammad Razavi S4 ; Hashemi Beni B5 ; Vashaee D7 ; Tayebi L6, 8
Authors

Source: Ceramics International Published:2014


Abstract

In order to improve the corrosion resistance and the surface bioactivity of biodegradable magnesium alloys, a nanostructured akermanite (Ca 2MgSi2O7) coating was grown on AZ91 magnesium alloy through electrophoretic deposition (EPD) assisted with micro arc oxidation (MAO) method. The crystalline structures, morphologies and compositions of samples were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The in vitro bio-corrosion (biodegradability) and bioactivity behaviors of samples were investigated by electrochemical and immersion tests. The experimental results indicated that the nanostructured akermanite coating could slow down the corrosion rate and improve the in vitro bioactivity of biodegradable magnesium alloy. Thus, magnesium alloy coated with nanostructured akermanite may be a promising candidate to be used as biodegradable bone implants. © 2013 Elsevier Ltd and Techna Group S.r.l.
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