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Chemical and Crystal Characterization of the Oxide Film Formed in 304L SS Under Autoclave Conditions, With and Without Crevice Formation

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Abstract

The principles of Stress Corrosion Cracking (SCC) are supported in the behavior of the oxide film formed into a crack; in fact the active dissolution of metal atoms after a film rupture and until fill repassivation is the base of slip dissolution model which is a good model to justified the crack tip advance in stainless steels (SS) used in vessel internal components for the nuclear industry. This paper shows the analyzed made at the oxide film formed on samples of 304L SS sensitized and non sensitized, under autoclave conditions (288°C, 8MPa) with and without crevice geometric formation, using SEM, XRD and Raman Spectra.

The crevice and no crevice condition allow establish the difference of an oxide formed on a free surface (no crevice) and the oxide formed on the wall in a crack (crevice); the chemical and physical properties of oxide film can alter the mechanism and kinetics of SCC process, so the difference between these two conditions will give more information about the behavior of the oxide film.

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Acknowledgements

The authors would like to express their appreciation to Dr. Enrique Camps, M.Sc. Víctor Hugo Castrejón, Dr. Manuel Espinosa, Mr. Julio Zenteno and Mr. Carlos Salinas.

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Authors and Affiliations

  1. Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca s/n, La Marquesa Ocoyoacac, México C.P., 52750

    Ángeles Díaz Sánchez, Aida Contreras Ramírez & Carlos Arganis Juárez

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  1. Ángeles Díaz Sánchez
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  2. Aida Contreras Ramírez
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  3. Carlos Arganis Juárez
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Sánchez, Á.D., Ramírez, A.C. & Juárez, C.A. Chemical and Crystal Characterization of the Oxide Film Formed in 304L SS Under Autoclave Conditions, With and Without Crevice Formation. MRS Online Proceedings Library 1769, 30 (2015). https://doi.org/10.1557/opl.2015.129

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