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

Published online by Cambridge University Press:  13 February 2015

Ángeles Díaz Sánchez ,
Aida Contreras Ramírez  and
Carlos Arganis Juárez
Ángeles Díaz Sánchez
Affiliation:
Instituto Nacional de Investigaciones Nucleares. Carretera México-Toluca s/n, La Marquesa Ocoyoacac, México C.P.52750
Aida Contreras Ramírez
Affiliation:
Instituto Nacional de Investigaciones Nucleares. Carretera México-Toluca s/n, La Marquesa Ocoyoacac, México C.P.52750
Carlos Arganis Juárez
Affiliation:
Instituto Nacional de Investigaciones Nucleares. Carretera México-Toluca s/n, La Marquesa Ocoyoacac, México C.P.52750
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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.

Keywords

corrosionpassivationfilm
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1769: Symposium 6E – Materials for Nuclear Applications , 2015 , IMRC 2014 6E-30
Copyright
Copyright © Materials Research Society 2015 

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References

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