Method for coating a substrate surface and coated product

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 24/08 (2006.01)

Patent

CA 2669052

Disclosed is a method of applying coatings to surfaces, wherein a gas flow forms a gas-powder mixture with a powder of a material selected from the group consisting of niobium, tantalum, tungsten, molybdenum, titanium, zirconium, nickel, cobalt, iron, chromium, aluminium, silver, copper, mixtures of at least two thereof or their alloys with at least two thereof or with other metals, the powder has a particle size of from 0.5 to 150 µm, an oxygen content of less than 500 ppm oxygen and a hydrogen content of less than 500 ppm, wherein a supersonic speed is imparted to the gas flow and the jet of supersonic speed is directed onto the surface of an object. The coatings prepared are used, for example, as corrosion protection coatings.

L'invention concerne un procédé destiné à appliquer des revêtements sur des surfaces, un écoulement de gaz formant un mélange gaz-poudre avec une poudre d'un matériau sélectionné dans le groupe constitué du niobium, du tantale, du tungstène, du molybdène, du titane, du zirconium, du nickel, du cobalt, du fer, du chrome, de l'aluminium, de l'argent, du cuivre, de mélanges d'au moins deux de ceux-ci ou de leurs alliages avec au moins deux de ceux-ci ou avec d'autre métaux, la poudre ayant une taille de particule comprise entre 0,5 et 150 µm, et une teneur en oxygène inférieure à 500 ppm, et une teneur en hydrogène inférieure à 500 ppm, une vitesse supersonique étant imprimée à l'écoulement de gaz et le jet de vitesse supersonique est dirigé sur la surface d'un objet. Les revêtements préparés sont utilisés par exemple en tant que revêtements de protection contre la corrosion.

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