Method for cleaning a gas turbine engine

Details Method for cleaning a gas turbine engine Method for cleaning a gas turbine engine

1986-02-13

1987-12-15

Metz, Andrew H.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 2, 134 2217, 134 2219, 134 28, 134 29, 134 33, C23G 102, C03C 2300, B08B 900, B08B 3000

Patent

active

047131209

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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