The Effect of Precipitates on the Bio-Corrosion Property of As-Cast Mg-Zn-Y Alloys

Wei Wei He; Ke Yang

doi:10.4028/www.scientific.net/AMR.97-101.2227

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101The Effect of Precipitates on the Bio-Corrosion...

The Effect of Precipitates on the Bio-Corrosion Property of As-Cast Mg-Zn-Y Alloys

Abstract:

Microstructure and bio-corrosion properties of as-cast Mg-Zn-Mn-Y alloys are investigated in detail to reveal the effect of the precipitate on the biocorrosion properties for biomedical application by scanning electronic microscopy electrochemical measurement and immersion tests. Alloy I is composed of primary Mg, Mg7Zn3 and I-phase, while there is only one secondary phase (W-phase) in alloy II. Alloy with W-phase exhibits a higher corrosion resistance and a lower corrosion current density. W-phase acts as a cathode and Mg matrix as an anode at the interface between W-phase and Mg matrix, while I-phase acts as an anode and Mg matrix as a cathode. The standard electrode potentials of secondsry phases are in the following order: W-phase>Mg>I-phase.

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Advanced Materials Research (Volumes 97-101)

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2227-2230

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https://doi.org/10.4028/www.scientific.net/AMR.97-101.2227

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Online since:

March 2010

Authors:

Wei Wei He, Ke Yang

Keywords:

Biomedical Material, Corrosion Property, Magnesium Alloy, Tafel Curve, Yttrium

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