Protective coating

C - Chemistry – Metallurgy – 25 – D

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Details

C25D 15/00 (2006.01) C23C 18/16 (2006.01) C25D 15/02 (2006.01) F01D 25/00 (2006.01)

Patent

CA 2172070

A method of producing a coating on a substrate comprising aluminising, chromising or siliconising the substrate and depositing on the treated substrate by electrolytic or electroless deposition a metal matrix M1 from a bath containing particles of CrAlM2 so as to co-deposit the particles with the matrix, M1 being Ni or Co or Fe or two or all of these elements and M2 being Y, Si, Ti, Hf, Ta, Nb, Mn, Pt, a rare earth element or two or more of these elements. Preferably, the method includes platinum aluminising of the substrate. Heat treatments may be incorporated before and after code deposition of the M1CrAlM2.

Procédé de production d'un revêtement sur un substrat consistant à aluminer, chromiser ou silicer le substrat et à déposer sur le substrat traité par dépôt électrolytique ou chimique une matrice métallique M¿1? provenant d'un bain contenant des particules de CrAlM¿2? de manière à déposer en même temps les particules et la matrice, M¿1? pouvant être Mi ou Co ou Fe ou encore deux ou bien tous ces éléments et M¿2? pouvant être Y, Si, Ti, Hf, Ta, Nb, Mn, Pt, un métal des terres rares ou bien deux de ces éléments ou plus. Ce procédé comprend de préférence l'alumisation au platine du substrat. Des traitements thermiques peuvent être intégrés dans le procédé avant et après le dépôt codé du M¿1?CrAlM¿2?.

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