Increased stability low concentration gases, products...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 16/40 (2006.01) C23C 16/04 (2006.01) F17C 1/10 (2006.01) F17C 3/12 (2006.01) F17C 13/00 (2006.01)

Patent

CA 2448697

Methods of passivating a metal surface are described, the methods comprising the step of i) exposing the metal surface ti a silicon-containing passivation material; ii) evacuating the metal surface, iii) exposing the treated surface to a gas composition having a concentration of reactive gas that is greater than an intended reactive gas concentration of gas to be transported by the metal surface; iv) evacuating the metal surface to remove substantially all of the gas composition to enable maintenance of an increased shelf-life, low concentration reactive gas at an intended concentration; and v) exposing the metal surface to the reactive gas at the intended reactive gas concentration. Manufactured products, high stability fluids, and methods of making same are also described.

L'invention concerne des procédés de passivation d'une surface métallique. Ces procédés consistent à: i) exposer la surface métallique à un matériau de passivation contenant du silicium; ii) faire le vide au niveau de la surface métallique, iii) exposer la surface traitée à une composition gazeuse ayant une concentration de gaz réactif supérieure à une concentration souhaitée de gaz réactif à transporter par la surface métallique; iv) faire le vide au niveau de la surface métallique afin d'enlever pratiquement toute la composition gazeuse pour maintenir à une concentration souhaitée un gaz réactif à faible concentration et à durée de conservation prolongée; et v) exposer la surface métallique au gaz réactif ayant la concentration souhaitée. L'invention concerne également des produits manufacturés, des fluides à haute stabilité, et des procédés de production de ceux-ci.

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