Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3429591
Keywords
beryllium alloys; copper alloys; corrosion resistance; electrochemistry; hydrophobicity; metallic glasses; nickel alloys; surface energy; titanium alloys; wetting; zirconium alloys
Categories
Funding
- NSFC [30770580]
- National Key Scientific Program-Nanoscience and Nanotechnology [2007CB936103]
- Program for New Century Excellent Talents in University [NCET-07-0033]
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The corrosion properties of two Zr-based bulk metallic glass, Zr(41)Ti(14)Cu(12)Ni(10)Be(23) (LM1) and Zr(44)Ti(11)Cu(10)Ni(10)Be(25) (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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3429591]
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