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Corrosion behavior of sodium-exposed stainless steels in chloride-containing aqueous solutions

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Abstract

The corrosion behavior of sodium-exposed stainless steels in chloride-containing aqueous solutions was investigated. Results showed that sodium-corroded Type 316 stainless steel (prototypic Liquid Metal Fast Breeder Reactor (LMFBR) fuel cladding) maintains its integrity after five months exposure in these solutions at 82°C and with chloride content up to 500 ppm. In contrast, sensitized and sodium mass transfer deposit-containing Type 304 stainless steel failed in the high chloride solution (500 ppm) within ten days at the same temperature. The failure was initiated by pitting and subsequently accelerated by intergranular attack. The results also show that high pH tends to reduce the susceptibility to failure while procedures commonly used for sodium removal have no significant effect on the water corrosion behavior of the test material. Based on the current results, it is concluded that water storage is feasible for spent fuels in a LMFBR reprocessing plant.

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Authors and Affiliations

  1. Materials Program, Westinghouse Advanced Reactors Division, 15663, Madison, PA

    P. C. S. Wu (Project Engineer)

  2. Chemical Technology, Westinghouse Advanced Reactors Division, 15663, Madison, PA

    B. R. Grundy (Principal Engineer)

  3. Mass Transfer, Westinghouse Advanced Reactors Division, 15663, Madison, PA

    R. L. Miller (Senior Engineer)

Authors
  1. P. C. S. Wu
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  2. B. R. Grundy
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  3. R. L. Miller
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Wu, P.C.S., Grundy, B.R. & Miller, R.L. Corrosion behavior of sodium-exposed stainless steels in chloride-containing aqueous solutions. Metall Trans A 10, 319–325 (1979). https://doi.org/10.1007/BF02658340

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  • DOI: https://doi.org/10.1007/BF02658340

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