The formation mechanism and biocorrosion property of CaSiO 3 /CaHPO 4  · 2H 2 O composite conversion coating on the extruded Mg‐Zn‐Ca alloy for bone implant application· | Zendy

Wei Zunjie | Zendy; Du Hui | Zendy; Zhang Erlin | Zendy

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The formation mechanism and biocorrosion property of CaSiO 3 /CaHPO 4 · 2H 2 O composite conversion coating on the extruded Mg‐Zn‐Ca alloy for bone implant application·

Author(s) -

Wei Zunjie,

Du Hui,

Zhang Erlin

Publication year - 2011

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.3625

Subject(s) - materials science , composite number , coating , diffractometer , alloy , chemical engineering , calcium silicate , magnesium , nuclear chemistry , metallurgy , composite material , scanning electron microscope , chemistry , engineering

In this work, a calcium silicate and calcium phosphate (CaSiO 3 /CaHPO 4 · 2H 2 O) composite coating was applied by a chemical reaction to an extruded Mg‐Zn‐Ca magnesium alloy. SEM observation showed that a flat and sand‐like conversion coating was formed. X‐ray diffractometer (XRD) analysis indicated that the conversion coating was composed of CaHPO 4 · 2H 2 O and a little amount of CaSiO 3 . The formation mechanism of CaSiO 3 /CaHPO 4 · 2H 2 O composite conversion coatings was discussed. The electrochemical polarization tests showed that the conversion coating markedly improved the biocorrosion resistance of Mg‐Zn‐Ca alloy in Hank's solution. Copyright © 2010 John Wiley & Sons, Ltd.

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