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Control of biodegradation of a Mg alloy in simulated body fluid

Zhang, Yafei, Forsyth, Maria, Hinton, Bruce and Wallace, Gordon 2011, Control of biodegradation of a Mg alloy in simulated body fluid, in ICC 2011 : 18th International Corrosion Congress : Corrosion Control, Contributing to a Sustainable Future for All, International Corrosion Council, [Perth, W. A.], pp. 1-8.

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Title Control of biodegradation of a Mg alloy in simulated body fluid
Author(s) Zhang, Yafei
Forsyth, Maria
Hinton, Bruce
Wallace, Gordon
Conference name International Corrosion. Congress (18th : 2011 : Perth, W. A.)
Conference location Perth, W. A.
Conference dates 20-24 Nov. 2011
Title of proceedings ICC 2011 : 18th International Corrosion Congress : Corrosion Control, Contributing to a Sustainable Future for All
Editor(s) [Unknown]
Publication date 2011
Conference series International Corrosion Congress
Start page 1
End page 8
Publisher International Corrosion Council
Place of publication [Perth, W. A.]
Keyword(s) magnesium alloys
biodegradable coronary artery stents
simulated body fluid
pitting corrosion
ionic liquids
Summary Mg alloy AZ31 is an attractive candidate for coronary artery stents, as it possesses excellent biocompatibility in human body and good mechanical properties. However, AZ31 magnesium alloys generally have poor corrosion resistance in the body environment. This paper reports on the early stages of an investigation into the corrosion mechanism and the morphology of corrosion of AZ31 in simulated body fluid (SBF). The investigation will also consider ways of improving corrosion resistance of this alloy in SBF through the use of ionic liquids. The results to date have shown that AZ31 suffers severe localized pitting corrosion in SBF. The pits mainly develop adjacent to the Al-Mn intermetallic second phase in the α matrix. Energy Dispersive X-Ray Spectroscopy results revealed the presence of Mg, O, Ca, and P in the layer of corrosion product. Treatment of the AZ31 alloy prior to corrosion testing in SBF with the ionic liquid trimethyl (butyl) phosphonium diphenyl phosphate (P1444DPP) produced some increase in the corrosion resistance of the alloy.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category E1 Full written paper - refereed
Copyright notice ©2011, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30042245

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