Alloys with the compositions of Cu49-xZr45Al6Six (x = 0, 0.5, 1, 2, and 3, in atom percent) were prepared by sucking the melt into a water-cooled copper. The effects of Si additions on the glass-forming ability (GFA) and corrosion behaviors in 1 N hydrochloric acid (HCl), 3.5 mass% sodium chloride (NaCl), and 0.5 N sulfuric acid (H2SO4) solutions were studied. It was found that, by adding 0.5% to 1% Si to substitute Cu in the Cu49Zr45Al6 alloy, the GFA was promoted, but extensive Si addition (>1%) decreased the GFA of the Cu49Zr45Al6 alloy. The results of weight-loss measurements, electrochemical polarization tests, and electrochemical impedance spectroscopy (EIS) tests on the Cu-based bulk metallic glasses (BMG) with different Si additions revealed that the Si addition improves the corrosion resistance in 1 N HCl, 3.5 mass% NaCl, and 0.5 N H2SO4 solutions, especially in 1 N HCl. The improvement of the corrosion resistance may be attributed to the formation of a silica-containing inner layer.
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1 November 2013
Research Article|
May 31 2013
Effects of Si Additions on the Glass-Forming Ability and Corrosion Resistance of Cu49Zr45Al6 Bulk Metallic Glass Available to Purchase
J.G. Lin
‡Corresponding author. E-mail: [email protected].
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‡Corresponding author. E-mail: [email protected].
*Faculty of Materials and Optical-Electronic Physics, Xiangtan University, Xiangtan, Hunan 411105, China.
**Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105, China.
Received:
January 05 2013
Revision Received:
May 15 2013
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2013 NACE International
2013
CORROSION (2013) 69 (11): 1088–1094.
Article history
Received:
January 05 2013
Revision Received:
May 15 2013
Citation
E.L. Su, X.Q. Wu, D.C. Zhang, Y. Li, J.G. Lin; Effects of Si Additions on the Glass-Forming Ability and Corrosion Resistance of Cu49Zr45Al6 Bulk Metallic Glass. CORROSION 1 November 2013; 69 (11): 1088–1094. https://doi.org/10.5006/0919
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