Anti-coking coatings for refractory alloys used in the...

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 9/20 (2006.01) B01J 19/00 (2006.01) C22C 30/00 (2006.01) C23C 16/02 (2006.01) C23C 16/30 (2006.01) C23C 16/34 (2006.01) C23C 16/40 (2006.01) F02B 77/04 (2006.01)

Patent

CA 2314356

The invention concerns anti-coking coats for refractory alloys used in the oil industry. Said coats are obtained by a method comprising the following steps: 1) submitting the refractory alloy surface (5) to the action of an oxygen and/or nitrogen gas plasma at a low frequency; 2) depositing on the treated surface a coating based on silicon oxide, nitride or oxynitride by plasma enhanced chemical vapour deposition at low frequency, from an organosilicon compound and a gas selected among oxygen and nitrogen; the two steps being carried out consecutively and continuously in the same installation (1) without venting between the two steps.

L'invention concerne des revêtements anti-cokage d'alliages réfractaires utilisés dans le domaine pétrolier. Ces revêtements sont obtenus par un procédé comprenant les étapes suivantes: 1) soumettre la surface en alliage réfractaire (5) à l'action d'un plasma gazeux d'oxygène et/ou d'azote à basse fréquence, et 2) déposer sur la surface ainsi traitée un revêtement à base d'oxyde, de nitrure ou d'oxynitrure de silicium par dépôt chimique en phase vapeur assisté par plasma à basse fréquence, à partir d'un composé organosilicié et d'un gaz choisi parmi l'oxygène et l'azote, les deux étapes étant réalisées consécutivement et en continu dans la même installation (1) sans mise à l'air entre les deux étapes.

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