Effect of various lanthanum sol-gel coatings on the 330Cb (Fe-35Ni-18Cr-1N b-2Si) oxidation at 900 degree C

The influence of a lanthanum sol-gel coating on the oxide scale adherence has been studied during the 330Cb (Fe-35Ni-18Cr-1N b-2Si) oxidation at 900 degree C, in air. The alloy oxidation is performed in order to generate a protective chromia scale acting as a good barrier against carburization. Argo...

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Published inApplied surface science Vol. 258; no. 2; pp. 678 - 686
Main Authors Buscail, H, Issartel, C, Riffard, F, Rolland, R, Perrier, S, Fleurentin, A, Josse, C
Format Journal Article
LanguageEnglish
Published 01.11.2011
Subjects
Adhesion
Coatings
Ferrous alloys
Lanthanum
Oxidation
Oxides
Scale (corrosion)
Sol gel process
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Summary:The influence of a lanthanum sol-gel coating on the oxide scale adherence has been studied during the 330Cb (Fe-35Ni-18Cr-1N b-2Si) oxidation at 900 degree C, in air. The alloy oxidation is performed in order to generate a protective chromia scale acting as a good barrier against carburization. Argon annealing of lanthanum sol-gel coatings have been performed at various temperatures in order to find the best conditions to insure the scale adherence. Kinetic results show that lanthanum sol-gel coatings lead to a lower oxidation rate compared to blank specimens. Thermal cycling tests on lanthanum the sol-gel coated specimen show that the oxide scale formed at 900 degree C, in air, is adherent.
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ISSN:0169-4332
DOI:10.1016/j.apsusc.2011.07.079