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On-site hydrogen generation can be accomplished by exposing aluminum to a gallium indium (GaIn) alloy and water.
English (United States)
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Use of GaIn Alloys to Promote the Hydrolysis of Aluminum
On-site hydrogen generation can be accomplished by exposing aluminum to
a gallium indium (GaIn) alloy and water.
It is well known that aluminum will readily react with water to form hydrogen
plus an oxide or hydroxide of aluminum. However, the extent of this reaction is
limited by the formation of a protective skin that forms on the aluminum and
prevents the reaction from proceeding to completion. Earlier work had shown
that the effectiveness of the protective coating can be reduced by amalgamating
the aluminum with mercury  or gallium .
This study has found that gallium alloys containing indium are particularly
well suited for breaking down the protective skin that forms on aluminum. These
GaIn alloys neither directly participate in the hydrogen generating reaction nor
vaporized during the reaction, and thus are almost completely recoverable. A
further advantage of using gallium alloys is that they do not form toxic vapors that
can result in a health hazard. References  U. S. Patent 3,540,854  U. S.