Formation and corrosion behavior of glassy Ni-Nb-Ti-Zr-Co(-Cu) alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)240-243
Journal / PublicationJournal of Alloys and Compounds
Volume434-435
Issue numberSPEC. ISS.
Publication statusPublished - 31 May 2007

Abstract

Bulk glassy Ni55Nb20Ti10Zr8Co7 alloy with a critical diameter of 2 mm was synthesized by copper-mold casting and the glass transition temperature, crystallization temperature and supercooled liquid region are 858 K, 911 K and 52 K, respectively. High corrosion resistance in 1N HCl and H2SO4 solutions was recognized for the glassy alloys Ni55Nb20Ti10Zr8Co7 together with Ni53Nb20Ti10Zr8Co6Cu3 which possesses higher glass-forming ability. They are spontaneously passivated with low passive current densities of the order of 10-2 A/m2 and their corrosion rate was less than 10-3 mm/year in the solutions. A small amount addition of Cu (3 at.%) in the Ni-Nb-Ti-Zr-Co glassy alloy system has little effect on corrosion behavior and surface film composition. Niobium-rich passive films form on the glassy Ni-Nb-Ti-Zr-Co(-Cu) alloys, which could be responsible for the high corrosion resistance. © 2006 Elsevier B.V. All rights reserved.

Research Area(s)

  • Amorphous materials, Corrosion, Ni-based alloys, Thermal analysis

Citation Format(s)

Formation and corrosion behavior of glassy Ni-Nb-Ti-Zr-Co(-Cu) alloys. / Pang, S. J.; Shek, C. H.; Asami, K.; Inoue, A.; Zhang, T.

In: Journal of Alloys and Compounds, Vol. 434-435, No. SPEC. ISS., 31.05.2007, p. 240-243.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal