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Investigations on the Electrochemical Behavior of Zr-Al-Cu-Ni Bulk Metallic Glass

Published online by Cambridge University Press:  10 February 2011

K. Buchholz ,
A. Gebert ,
K. Mummert ,
J. Eckert  and
L. Schultz
K. Buchholz
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany
A. Gebert
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany
K. Mummert
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany
J. Eckert
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany
L. Schultz
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany
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Abstract

The passivation behavior of bulk glassy Zr55Al10Cu30Ni5 alloy samples in weakly alkaline sulphate solution (pH = 8) is investigated in comparison to the arc-melted crystalline alloy, to the main alloying component zirconium and to aluminium. Results of potentiodynamic and potentiostatic polarization measurements reveal the formation of a stable passivating surface film on the glassy alloy grown by a high-field mechanism. Auger electron spectroscopic investigations of anodized sample surfaces show that the films formed on the glassy Zr-Al-Cu-Ni alloys exhibit a composition gradient in cross-sectional direction. In 0.001M NaCl electrolytes bulk glassy Zr-Al- Cu-Ni samples are susceptible to pitting corrosion, which is due to the existence of crystalline inclusions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 161
Copyright
Copyright © Materials Research Society 1999

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