Corrosion Behavior and Surface Analysis of Melt-spun Mg-based Metallic Glass in Physiological Saline Solution

• The developed Mg-based metallic glass shows great potential as implants in biomedicalapplications instead of crystalline Mg alloys, which may possesses acceptable corrosion properties. Inthis study, corrosion behaviors of melt-spun amorphous Mg67Zn28Ca5 ribbons were investigated inphysiological saline solution. Electrochemical testing and hydrogen evolution rate indicated that theglassy ribbons obtained at lower wheel speed were more noble with smaller corrosion current, andpossessed a comparatively lower corrosion rate in physiological saline solution. Surface morphologyanalysis revealed that glassy Mg67Zn28Ca5 ribbons exhibited a strong susceptibility to localizedpitting corrosion. A Zn-rich passive layer was formed on the surfaces of the glassy ribbons, indicatingthat Zn was an effective alloying element to enhance the corrosion resistance of amorphousMg67Zn28Ca5 alloys.

Nyckelord

Corrosion

metallic glass

magnesium alloy

biodegradation

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