Title of article
A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid
Author/Authors
Wang، نويسنده , , Y.M. and Guo، نويسنده , , J.W. and Shao، نويسنده , , Z.K. and Zhuang، نويسنده , , J.P and Jin، نويسنده , , M.S. and Wu، نويسنده , , C.J. and Wei، نويسنده , , D.Q. and Zhou، نويسنده , , Y.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
7
From page
8
To page
14
Abstract
We report a strategy to prepare biocompatible metasilicate-based ceramic coatings by microarc oxidation (MAO) on AZ91D magnesium alloy in sodium silicate solution with Ca(H2PO4)2 additive. X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques were used to assess the phase composition and microstructure of the coatings. The corrosion behavior of the coated samples was evaluated by electrochemical and immersion tests in simulated body fluid (SBF). The results show that the corrosion resistance of AZ91D alloy is significantly improved due to the formation of dense coatings with biocompatible CaSiO3, CaMgSiO4 and Mg2SiO4 phases. Increasing Ca(H2PO4)2 content in the based sodium silicate leads to better corrosion resistance of AZ91D alloy. The results suggested a promising method for surface modification of degradable magnesium alloy as biomedical applications.
Keywords
Coating , Microarc oxidation , Magnesium alloy , BIOCORROSION
Journal title
Surface and Coatings Technology
Serial Year
2013
Journal title
Surface and Coatings Technology
Record number
1827382
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