Hot test fluid containing vapor phase inhibition
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United States of America Patent
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Jul 25, 2017
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N/A
app pub date -
Nov 10, 2011
filing date -
Apr 22, 2009
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Abstract
This invention covers a formulation providing protection against corrosion in liquid and vapor phase. Such formulations are used in applications where engine parts or fuel cell systems are subjected to a “running-in” or “hot-test” prior to final assembly or storage. The invention includes a concentrate as well as a dilute solution. The synergistic combination of inorganic ammonium derivatives in combination with monocarboxylic or dicarboxylic acids increases the period of protection. This enables storage for a longer period when the engine parts are shipped or stored prior to assembling. The use of the described invention pre-conditions the metal surface and provides protection even if afterwards the liquid is almost completely removed.
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