Formation of Bulk Glassy Ni-(Co-)Nb-Ti-Zr Alloys with High Corrosion Resistance
- 1 January 2002
- journal article
- Published by Japan Institute of Metals in MATERIALS TRANSACTIONS
- Vol. 43 (7), 1771-1773
- https://doi.org/10.2320/matertrans.43.1771
Abstract
Ni60−xCoxNb20Ti10Zr10 (x=0–40 at%) glassy alloys were formed by melt spinning and a large supercooled region of over 40 K for the 0–20 at%Co alloys was found. The Ni60−xCoxNb20Ti10Zr10 (x=0–20 at%) alloys have high glass-forming ability leading to the formation of bulk glassy rods with diameters up to 1.5 mm by copper-mold casting. The bulk glassy alloys with 0–20 at%Co exhibited nearly the same anodic polarization behavior in 1 N HCl solution. They were spontaneously passivated with a low passive current density of the order of 10−2 A/m2 and no pitting corrosion due to anodic polarization with a potential sweeping up to 2.0 V vs. Ag/AgCl occurred, indicating their high corrosion resistance in the aggressive acid.Keywords
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