Abstract
When 20 pct cold-worked Type 316 stainless steel is exposed to Cs at 700°C under controlled oxygen-chemical potential environment, Cs penetration into the stainless steel grain boundaries occurs at oxygen potentials ΔGo2 ≥ -96 kcal per mole. At lower oxygen potentials (~ΔGo2 ≤ —110 kcal per mole), no corrosion occurs. Under the same experimental conditions, when the stainless steel is exposed to Cs:Te (2:1, atomic), corrosion occurs and penetration morphology appears to depend strongly on the oxygen-potential environment. The stainless steel suffers intergranular corrosion by Te (in the presence of Cs-Te) under conditions where chromium oxidation is not expected to occur. The kinetics of grain-boundary penetration by Te have been studied at temperatures between 550 and 700°C. The depth of the penetrated zone varies as (time)1/2, and the process has an activation energy of 34 kcal per mole. The results are discussed, and the effects of stainless steel microstructure and externally applied stress on corrosion reactions are also described.
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J. W. Weber and E. D. Jensen:Trans. Amer. Nucl. Soc, 1971, vol. 14, p. 175.
E. A. Aitken, S. K. Evans, H. S. Rosenbaum, and B. F. Rubin:Trans. Amer. Nucl. Soc, 1971, vol. 14, p. 176.
P. S. Maiya and D. E. Busch:J. Nucl. Mater., 1972, vol. 44, p. 96.
P. S. Maiya and D. E. Busch:Met. Trans., 1973, vol. 4, p. 663.
E. A. Aitken, S. K. Evans, and B. F. Rubin: General Electric Company Report (Class I), NEDO-12321, Vallecitos, California, 1972.
F. Rosa and P. S. Maiya:J. Nucl. Mater., 1974, vol. 50, p. 111.
L. A. Neimark, J. D. B. Lambert, W. F. Murphy, and W. Renfro:Nucl. Tech., 1972, vol. 16, p. 75.
J. P. Coughlin: Bulletin 542, Bureau of Mines, 1954.
Y. Jeannin, C. Mannerskaantz, and F. D. Richardson:Trans. TMS-AIME, 1963, vol. 227, p. 300.
P. S. Maiya: Reactor Development Program Progress Report, December 1972, ANL-RDP-12, 1973, p. 6.24, and M. Billone, Argonne National Laboratory, private communication, 1972.
J. Wood:J. Nucl. Mater., 1972-1973, vol. 45, p. 105.
J. W. Weber: Hanford Engineering Development Laboratory, Richland, Washington, HEDL-TME-7369, 1973.
B. Weiss and R. Stickler:Met. Trans., 1972, vol. 3, p. 851.
G. Wood and D. P. Whittle:Corr. Sci., 1967, vol. 7, p. 763.
G. H. Bishop:Trans. TMS-AIME, 1968, vol. 242, p. 1343.
A. D. LeClaire:Brit. J. Appl. Phys., 1963, vol. 14, p. 351.
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Maiya, P.S., Busch, D.E. Grain-boundary penetration of type 316 stainless steel exposed to cesium or cesium and tellurium. Metall Trans A 6, 409 (1975). https://doi.org/10.1007/BF02667298
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DOI: https://doi.org/10.1007/BF02667298