Effect of Nitrate on the Critical Potentials of Alloy 22 in Chloride Containing Environments [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 1 pages : digital, PDF file
- Additional Creators:
- United States. Department of Energy. Yucca Mountain Project Office
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- The study of Alloy 22 has been undertaken in several selected nitrate/chloride (NO₃Cl⁻) electrolytes. These electrolytes include chloride concentrations [Cl⁻] of 1.0, 3.5 and 6.0 metal with NO₃/Cl⁻ ratios of 0.05, 0.15 and 0.5 at various temperatures. Alloy 22 maintains is passivity in most industrial environments. As a result, it is highly desirable for numerous industrial applications including underground waste disposal systems. Alloy 22 possesses remarkably low general corrosion rates. It has exceptional resistance so localized corrosion including environmentally assisted cracking [1-7]. Alloy 22 (N06022) is a nickel(Ni)-alloy and contains 22% chromium (Cr), 13% molybdenum (Mo), 3% tungsten (W) and about 3% iron (Fe). The goal of this study was to determine the levels of NO₃ required for effective inhibition of crevice corrosion at Alloy 22. To achieve this, carefully designed statistical cost matrices covering the selected range of CT compositions and temperatures were employed in carrying out the experiments. Specimens for three experiments were in the form of multiple crevice assemblies (MCA), optimized with 24 artificial crevice sites. Tests used in this investigation involved open circuit potential monitoring, polarization resistance, and cyclic polarization experiments. Potentiostatic polarization test were also employed.
- Published through SciTech Connect.
S. Gordon; K. King; G. Gdowski; T. Summers; H. Elayat; G. Ilevbare.
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