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Corrosion of martensitic and austenitic steels in liquid gallium

Published online by Cambridge University Press:  31 January 2011

F. Barbier  and
J. Blanc
F. Barbier*
Affiliation:
CEA - CEREM / SCECF, BP 6, 92265 Fontenay-aux-Roses cedex, France
J. Blanc
Affiliation:
CEA - CEREM / SCECF, BP 6, 92265 Fontenay-aux-Roses cedex, France
*
a)Address all correspondence to this author. e-mail: barbier@cyborg.cea.fr
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Abstract

The compatibility of 1.4914 martensitic steel and 316 L austenitic stainless steel has been studied in the presence of static liquid gallium. It was shown that the materials are severely attacked by the liquid metal. The corrosion is characterized by the formation of a reaction layer identified as FeGa3. Depending on the steel, the growth kinetics and the morphology of the layer are found to be different. In the case of 1.4914 steel, the growth law is linear, which implies an interface controlled regime. Moreover, the layer formed from an initially rectangular substrate exhibits a typical cruciform pattern. In the case of 316 L steel, a parabolic growth is found after a transient period, indicating a process mainly controlled by diffusion. Contrary to the martensitic steel, the morphology of the layer occurring during the solid-liquid interaction leads to complete coverage of the 316 L substrate, with rounded edges.

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Articles
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Journal of Materials Research , Volume 14 , Issue 3 , March 1999 , pp. 737 - 744
Copyright
Copyright © Materials Research Society 1999

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