TITLE

Correlation between corrosion performance and surface wettability in ZrTiCuNiBe bulk metallic glasses

AUTHOR(S)
Wang, Y. B.; Li, H. F.; Zheng, Y. F.; Wei, S. C.; Li, M.
PUB. DATE
June 2010
SOURCE
Applied Physics Letters;6/21/2010, Vol. 96 Issue 25, p251909
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The corrosion properties of two Zr-based bulk metallic glass, Zr41Ti14Cu12Ni10Be23 (LM1) and Zr44Ti11Cu10Ni10Be25 (LM1b) were investigated by electrochemical measurements in simulated body fluid with pH value 7.4. With much lower current density and higher impedance values, as well as higher pitting potential, LM1b showed superior corrosion resistance to LM1. Under identical sample preparation and testing conditions, the difference in corrosion performance is found to relate closely to their surface wettability difference, as contact angle tests showed that LM1b is more hydrophobic than LM1. The excess free volume was measured and found having a close correlation with the wettability or the surface energy.
ACCESSION #
51709477

 

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