AQUEOUS COMPOSITIONS AND METHODS OF CLEANING HIGH-STRENGTH STEEL Russian patent published in 1998 - IPC

FIELD: aircraft industry; cleaning of gas turbines in hot state to remove organic and inorganic residues of combustion products. SUBSTANCE: invention offers aqueous compositions and methods for removal of residues of combustion from steel articles with use of compositions containing ethoxylated amines, ethylenediaminetetracetic acid and demineralized water with resistance not in excess of 0.9 mcOhm. Compositions comply with the criteria of test of potential hydrogen embrittlement to Standard ANST (ASTM F 519-77). EFFECT: higher efficiency. 17 cl, 1 tbl