Abstract
THE usual theory proposed for the explanation of inter-crystalline corrosion of austenitic steels involves the precipitation of chromium carbides at the grain boundaries. This results in chromium impoverishment around the carbides and subsequent enhanced corrosion of the depleted region. Alternative explanations do not involve chromium depletion but postulate the precipitation of non-equilibrium carbides having low corrosion resistance1.
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References
Shvartz, G. L., and Kristal, M. M., “Corrosion of Chemical Apparatus”, p. 84. Translated from Russian by Consultants Bureau Inc., New York (Chapman and Hall Ltd., London, 1959).
Castaing, R., Ph.D. Thesis University of Paris (1951). Castaing, R., Philibert, J., and Crussard, C., Trans. Amer. Inst. Met. Eng., 209, 389 (1957).
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HOPKINSON, B., CARROLL, K. Chromium Distribution around Grain Boundary Carbides found in Austenitic Stainless Steel. Nature 184, 1479–1480 (1959). https://doi.org/10.1038/1841479a0
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DOI: https://doi.org/10.1038/1841479a0
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