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Repassivation Potential of Alloy 22 in Sodium and Calcium Chloride Brines

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Abstract

A comprehensive matrix of 60 tests was designed to explore the effect of calcium chloride vs. sodium chloride and the ratio R of nitrate concentration over chloride concentration on the repassivation potential of Alloy 22. Tests were conducted using the cyclic potentiodynamic polarization (CPP) technique at 75°C and at 90°C. Results show that at a ratio R of 0.18 and higher nitrate was able to inhibit the crevice corrosion in Alloy 22 induced by chloride. Current results fail to show in a consistent way a different effect on the repassivation potential of Alloy 22 for calcium chloride solutions than for sodium chloride solutions

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Authors and Affiliations

  1. Lawrence Livermore National Laboratory, 94550, Livermore, CA, USA

    B. Rebak Raul

  2. Electric Power Research Institute, 94304, Palo Alto, CA, USA

    O. Ilevbare Gabriel

  3. Atomic Energy Commission of Argentina, 1650, San Martin, Argentina

    M. Carranza Ricardo

Authors
  1. B. Rebak Raul
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  2. O. Ilevbare Gabriel
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  3. M. Carranza Ricardo
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Raul, B.R., Gabriel, O.I. & Ricardo, M.C. Repassivation Potential of Alloy 22 in Sodium and Calcium Chloride Brines. MRS Online Proceedings Library 1107, 527 (2008). https://doi.org/10.1557/PROC-1107-527

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  • DOI: https://doi.org/10.1557/PROC-1107-527

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