| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for removing engine deposits from turbine components. <P>SOLUTION: The cleaning composition comprises an aqueous solution that is substantially free of acetic acid and comprising a nitrate ion source in an amount, by weight of the nitrate ion, of 470-710 grams/liter, and a bifluoride ion source in an amount, by weight of the bifluoride ion, of 0.5-15 grams/liter. The method for removing the engine deposits comprises a step for providing a turbine component 10 having a surface 14 with engine deposits 58 thereon, wherein the turbine component 10 comprises a nickel and/or cobalt-containing base metal 50, and a step for treating the surface 14 of the turbine component 10 with the cleaning composition to convert the engine deposits 58 thereon to a removable smut without substantially etching the base metal 50 of the turbine component 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
