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Control of biodegradation of a Mg alloy in simulated body fluid
conference contribution
posted on 2011-01-01, 00:00 authored by Yafei Zhang, Maria ForsythMaria Forsyth, Bruce HintonBruce Hinton, G WallaceMg 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.
History
Event
International Corrosion. Congress (18th : 2011 : Perth, W. A.)Pagination
1 - 8Publisher
International Corrosion CouncilLocation
Perth, W. A.Place of publication
[Perth, W. A.]Start date
2011-11-20End date
2011-11-24Language
engPublication classification
E1 Full written paper - refereedCopyright notice
2011, The AuthorsTitle of proceedings
ICC 2011 : 18th International Corrosion Congress : Corrosion Control, Contributing to a Sustainable Future for AllUsage metrics
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