EDP Sciences Journals List
Issue J. Phys. IV France
Volume 03, Number C9, Décembre 1993
Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température
Page(s) C9-309 - C9-315
DOI http://dx.doi.org/10.1051/jp4:1993930

Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température

J. Phys. IV France 03 (1993) C9-309-C9-315

DOI: 10.1051/jp4:1993930

Influence of minor additions to Fe-Mn-Al alloys in an oxidizing environment - Role of a cerium oxide modified surface on silicon containing alloys

H. Buscail, P. Sotto and J.P. Larpin

Laboratoire de Recherches sur la Réactivité des Solides, Faculté des Sciences Mirande, B.P. 138, 21004 Dijon Cedex, France


Abstract
Various silicon containing Fe-Mn-Al alloys were studied to estimate the influence of the silicon content on their oxidation behaviour. Silicon has a beneficial effect. Diffusion properties seem to be modified in the alumina scale grown at the scale substrate interface. Then, both scale growth and adherence are strongly affected. One possibility for modifying scale growth properties without changing the strength of the base alloy involves surface additions. The oxidation behaviour of a CeO2 surface modified Fe-Mn-Al-(Si) alloy was studied at 850 °C in pure oxygen for exposure times up to 70 h. A significant improvement in corrosion resistance of the silicon free alloy was observed after dipping in a cerium containing sol. This result is in accordance with the classical beneficial effect of "active elements". On the other hand, cerium deposition on a silicon containing Fe-Mn-Al alloy leads to an opposite result. The inhibition of the beneficial silicon effect by cerium additions will be discussed.



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