A method of producing a protective gas and a gas mixture

Details A method of producing a protective gas and a gas mixture A method of producing a protective gas and a gas mixture

B - Operations, Transporting

23

K

B23K 35/38 (2006.01)

Patent

CA 2078140

The present invention relates to a method of producing a protective gas consisting of 0.0010-0.100 percent by volume ni- trogen monoxide, 0-90 percent by volume helium, 0-5 percent by volume hydrogen, 0-50 percent by volume carbon dioxide, and the remainder argon. The invention also relates to a gas mixture for producing the productive gas. The method of producing the protective gas is characterized by dissolving carbon monoxide in condensed argon to a concentration of 0.0010-0.100 percent by volume, calculated on gas phase, vaporizing the resultant solution and mixing remaining constituents in the vaporized solution in such proportions as to obtain a protective gas of the predetermined composition. The gas mixture used for producing the protec- tive gas is characterized in that it consists of 0.0010-0.100 percent by volume nitrogen monoxide in condensed argon, calculated on gas phase, and is preferably held under an overpressure.

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