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) C9-771 - C9-778
DOI http://dx.doi.org/10.1051/jp4:1993980

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) C9-771-C9-778

DOI: 10.1051/jp4:1993980

Coating behaviour for materials of industrial waste incinerators and heat exchangers in high temperature corrosive atmospheres

F. Devisme1, T. Flament1, J.C. Mulet2, C. Prebende2 and J.L. Martigneaux3

1  CEA/DTA/CEREM/DTM/SCECF, Centre d'Etudes de Fontenay-aux-Roses, 60-68 Avenue du Général Leclerc, B.P. 6, 92265 Fontenay-aux-Roses Cedex, France
2  BERTIN et Cie, Centre de Bayonne, Zone Industrielle, 40220 Tarnos, France
3  GEREP S.A. Zone industrielle de Mitry-Compans, rue Jacquard, 77290 Mitry-Mory, France


Abstract
A coating obtained by flame spraying (Ni-Al) and an aluminizing type (Sermaloy J) were tested in laboratory and in industrial waste incinerator (substrate : AISI 310S steel). In laboratory tests, the studied parameters were : HCl-content (1 and 3% vol. in air + 0.1% vol. SO2), temperature (600 and 800 °C) and thermal cycling between 800 and 400 °C. The increasing of the temperature and HCl-content, and also thermal cycling lead to a degradation of the non coated steel and Ni-Al coated specimen behaviours ; as for Sermaloy J, only temperature raising seems to have a detrimental effect (first batch). For the field tests, the specimens were exposed at about 600 °C in flue gases containing about 0.4% vol. HCl and flying ashes (sodium chloride and sulfate) ; the corrosion phenomena are more closed to molten salts interactions than to gaseous corrosion : Ni-Al behaves better compared with Sermaloy J and the non coated steel which are much more attacked than in laboratory. However, Sermaloy J and Ni-Al can lead to a real protection of a steel substrate but the manufacturing conditions have a great influence on the behaviour of the coated specimens.



© EDP Sciences 1993