Corrosion behavior of bulk amorphous Zr55Al10Cu 30Ni5-xPdx alloys

F. X. Qin, H. F. Zhang, P. Chen, F. F. Chen, D. C. Qiao, Z. Q. Hu

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24 Citations (Scopus)

Abstract

Bulk amorphous Zr55Al10Cu30Ni 5-xPdx (x=0, 5at.%) alloys were produced by copper mould casting. The microstructure of samples was characterized by X-ray diffraction (XRD). The corrosion resistance of the bulk amorphous alloys was studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The Pd-free alloy showed an active-passive transition by anodic polarization in 3.5% NaCl solution, it was spontaneously passive and had a wide passive region with significantly low passive current density. The 5% Pd amorphous alloy shows a single active state even with a limited passive region. X-ray photoelectron spectroscopy (XPS) analysis revealed that the spontaneous passive films formed on the alloys after immersion in 0.6 M NaCl solution for 72 h were composed of the oxidation of Zr, Al and Cu element. The Pd-free and 5% Pd alloys show excellent corrosion properties in 1 M NaOH solution.

Original languageEnglish
Pages (from-to)1246-1250
Number of pages5
JournalMaterials Letters
Volume58
Issue number7-8
DOIs
Publication statusPublished - 2004 Mar 1

Keywords

  • Bulk amorphous alloy
  • Corrosion resistance
  • Glass-forming ability
  • Pitting
  • XPS

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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