EFFECT OF Y ADDITION ON THE CORROSION BEHAVIOR OF MELT-SPUN AMORPHOUSMg–CuRIBBONS

H. B. Yao, Y. Li (), A. T. S. Wee, J. S. Pan and J. W. Chai
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H. B. Yao: Department of Materials Science, National University of Singapore, Singapore 119260, Singapore
Y. Li: Department of Materials Science, National University of Singapore, Singapore 119260, Singapore
A. T. S. Wee: Department of Physics, National University of Singapore, Singapore 119260, Singapore
J. S. Pan: Institute of Materials Research and Engineering, Singapore 119260, Singapore
J. W. Chai: Institute of Materials Research and Engineering, Singapore 119260, Singapore

Surface Review and Letters (SRL), 2001, vol. 08, issue 05, 575-580

Abstract: Hydrogen evolution testing and anodic potentiodynamic polarization revealed that Y addition has a beneficial effect on the corrosion resistance of melt-spun amorphousMg–Curibbon, which is related to the properties of the surface film ofMg–Cuand the manner in which its properties are modified as a result of Y alloying. X-ray photoelectron spectroscopy (XPS) depth profiling revealed that the breakdown of Mg–Cu was caused by the hydration of surface oxide components and the incorporation of detrimentalCO32–anions into the surface film. Y addition in Mg–Cu improves the corrosion resistance byY2O3incorporation into the passive film, thus stabilizing the surface oxide components from hydration and preventing the incorporation ofCO32–into the passive film.

Date: 2001
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DOI: 10.1142/S0218625X01001464

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