Cyclic-Anodic Polarization Studies of a Zr41.2Ti13.8Ni10Cu12.5Be22.5 Bulk Metallic Glass
- University of Tennessee, Knoxville (UTK)
- Liquidmetal Technologies
- ORNL
Cyclic-anodic-polarization tests were conducted on a Zr-based bulk metallic glass (BMG) with a chemical composition of Zr{sub 41.2}Ti{sub 13.8}Ni{sub 10}Cu{sub 12.5}Be{sub 22.5}. Samples were compared in two different electrolytes at two different temperatures. Tests were conducted at 22 and 37 C in both, an aerated 0.6 M NaCl electrolyte and a phosphate-buffered saline (PBS) electrolyte with a physiologically relevant dissolved oxygen content. For all tested conditions, the alloy demonstrated passive behavior at the open-circuit potential with low corrosion rates. However, a susceptibility to localized pitting corrosion was observed in all of the tested conditions. At both temperatures, statistical analyses revealed that the LM-001 BMG exhibited comparable or improved values for every corrosion parameter in the PBS electrolyte, as compared to the NaCl electrolyte. The mean differences between the protection potentials and the open-circuit corrosion potentials were determined to be positive values with greater magnitudes for the PBS electrolyte. Thus, the material may undergo pitting corrosion at surface flaws or after incubation-time periods, depending on the local and bulk environments, with lower probabilities for the PBS electrolyte.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 931594
- Journal Information:
- Intermetallics, Journal Name: Intermetallics Journal Issue: 10-11 Vol. 12; ISSN 0966-9795; ISSN IERME5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Decomposition and primary crystallization in undercooled Zr{sub 41.2}Ti{sub 13.8}Cu{sub 12.5}Ni{sub 10.0}Be{sub 22.5} melts
Crystallization pathway in the bulk metallic glass Zr{sub 41.2}Ti{sub 13.8}Cu{sub 12.5}Ni{sub 10}Be{sub 22.5}