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Corrosion des aciers et superalliages inoxydables en eau tritiée ‐ influence du tritium et des espèces radiolytiques
Author(s) -
Bellanger Gilbert
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770314
Subject(s) - corrosion , oxide , materials science , alloy , metallurgy , tritium , diffusion , nuclear chemistry , chemistry , physics , nuclear physics , thermodynamics
Abstract To better understand the phenomena in metl equipment corrosion in tritiated water, a study of the behavior of oxide layers on a cobalt‐based stainless superalloy was made in this highly radioactive medium. The oxide characteristics are modified from the corrosion potential, in passivity and up to teh passivity and transpassivity limits. The corrosion of oxide sublayers, as exfoliation of the oxide, was shown. This would appear to be due to diffusion of tritiated species in the oxide. These species accumulate at the oxide‐alloy interface, thus modifying the number of charge carriers in te oxide.