Stabilisation of stored gas
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United States of America Patent
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Jul 21, 2015
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app pub date -
Sep 12, 2008
filing date -
Sep 14, 2007
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Abstract
A method of treating the internal surface of a container for the storage of gas, such as a gas cylinder, that is made from or lined with aluminum or aluminum alloy. The method is characterized in that it comprises creating a freshly exposed aluminum surface, for example by the use of a wet grinding, in the presence of a surfactant. The surfactant is preferably derived from C6-C18 carboxylic acids. The container for the storage of gas provides long-term gas stability. The internal surface of the container has a substantially continuous disturbed layer and is hydrophobic. It may also incorporate groups or species derived from the surfactant and/or comprise oxides or oxyhydroxides of aluminum.
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