A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid

Y. M. Wang; J. W. Guo; Z. K. Shao; J. P. Zhuang; M. S. Jin; C. J. Wu; D. Q. Wei; Y. Zhou

doi:10.1016/j.surfcoat.2012.12.040

A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid

Y. M. Wang^*
, J. W. Guo
, Z. K. Shao
, J. P. Zhuang
, M. S. Jin
, C. J. Wu
, D. Q. Wei
, Y. Zhou

^*Corresponding author for this work

Harbin Institute of Technology
Harbin Medical University

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

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.

Original language	English
Pages (from-to)	8-14
Number of pages	7
Journal	Surface and Coatings Technology
Volume	219
DOIs	https://doi.org/10.1016/j.surfcoat.2012.12.040
State	Published - 25 Mar 2013

Keywords

Biocorrosion
Coating
Magnesium alloy
Microarc oxidation

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10.1016/j.surfcoat.2012.12.040

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@article{99e06071758c47fca49e01c7ccb918df,

title = "A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid",

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 = "Biocorrosion, Coating, Magnesium alloy, Microarc oxidation",

author = "Wang, \{Y. M.\} and Guo, \{J. W.\} and Shao, \{Z. K.\} and Zhuang, \{J. P.\} and Jin, \{M. S.\} and Wu, \{C. J.\} and Wei, \{D. Q.\} and Y. Zhou",

year = "2013",

month = mar,

day = "25",

doi = "10.1016/j.surfcoat.2012.12.040",

language = "英语",

volume = "219",

pages = "8--14",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

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}

TY - JOUR

T1 - A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid

AU - Wang, Y. M.

AU - Guo, J. W.

AU - Shao, Z. K.

AU - Zhuang, J. P.

AU - Jin, M. S.

AU - Wu, C. J.

AU - Wei, D. Q.

AU - Zhou, Y.

PY - 2013/3/25

Y1 - 2013/3/25

N2 - 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.

AB - 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.

KW - Biocorrosion

KW - Coating

KW - Magnesium alloy

KW - Microarc oxidation

UR - https://www.scopus.com/pages/publications/84875236853

U2 - 10.1016/j.surfcoat.2012.12.040

DO - 10.1016/j.surfcoat.2012.12.040

M3 - 文章

AN - SCOPUS:84875236853

SN - 0257-8972

VL - 219

SP - 8

EP - 14

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid

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Keywords

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