Abstract
The Ni57Nb19Zr19Ta5 glassy alloy possesses high corrosion resistance in severe environments, i.e. boiling 6N HNO3 and 6N HNO3 + 5 g/1 Cr6+ solutions. In both solutions, the corrosion resistance of the Ni57Nb 19Zr19Ta5 alloy is much better than that of NAR-3 lONb stainless steel which is developed as nitric acid corrosion resistant stainless steel. XPS analysis reveals that the high corrosion resistance of the Ni-based glassy alloys is due to the formation of the highly protective passive film composed exclusively of Nb5+ and Ta5+ cations after immersion in the solution without Cr6+ ions, and Nb5+, Ta5+ and Cr3+ cations after immersion in the solution with Cr6+ ions.
Original language | English |
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Pages (from-to) | 1304-1307 |
Number of pages | 4 |
Journal | Materials Transactions |
Volume | 50 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2009 Jun |
Keywords
- Corrosion resistance
- Glassy alloys
- Nitric acid
- Polarization curves
- X-ray photoelectron spectroscopy (XPS) analysis
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering