Compositions – Fluent dielectric – N-containing
Patent
1987-08-03
1989-05-30
Pal, Asok
Compositions
Fluent dielectric
N-containing
252544, 252546, 252548, 252 794, 252156, 134 2, C23G 102
Patent
active
048349127
ABSTRACT:
A composition and method for removing deposits (10) from the internal components (24) of a gas turbine engine (18) utilizing a cleaning composition (15) which comprises an aqueous solution of hydroxylamine sulfate, a chelating agent, a compound selected from the group consisting of ammonium sulfamate, ammonium sulfamide, and hydroxylamine-o-sulfonic acid, and, an alkaline pH modifying substance added in an amount sufficient to achieve a pH value of between 6.5 and 14. The method involves contacting the deposits with the cleaning composition, such as in an apply and soak type pattern, chemically dislodging the deposits from the component surfaces. The engine is rinsed to remove the dislodged deposits and residual cleaning composition.
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Cellich William A.
Hodgens, II Henry M.
Pal Asok
Sapone William J.
United Technologies Corporation
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