| 主权项 |
1. A method of cleaning a turbine engine, the method comprising:
directing a cleaning solution towards a component of the turbine engine having a layer of foreign material thereon, the layer of foreign material formed at least partially from at least one of thermal reaction products of the foreign material and interstitial cement, to at least partially remove the foreign material from the component, the cleaning solution comprising a reagent composition comprising: water within a range between about 25 percent and about 70 percent by volume of the reagent composition; an acidic component within a range between about 0.1 percent and about 50 percent by volume of the reagent composition; an amine compound within a range between about 1 percent and 40 percent by volume of the reagent composition, wherein the reagent composition is diluted with water by a factor of up to about 40; and a surfactant within a range between about 1 percent and about 7 percent by volume of the reagent composition, wherein the cleaning solution has a pH value in the range between 2.5 and 7.0, the reagent composition is configured to selectively dissolve at least one of oxide-based, chloride-based, sulfate-based, and carbon-based constituents of the foreign material, and the reagent composition is substantially unreactive with metallic materials and with a non-metallic material selected from the group consisting of rare earth element ceramic oxides, ceramic matrix composites and polymeric matrix composites. |
