| 摘要 |
A method for removing a chromide coating from the surface of a substrate is described. The coating is treated with a composition which includes an acid having the formula H<SUB>x</SUB>AF<SUB>6</SUB>, where "A" can be Si, Ge, Ti, Zr, Al, or Ga; and x is 1-6. An exemplary acid is hexafluorosilicic acid. The composition may also include a second acid, such as phosphoric acid or nitric acid. In some instances, a third acid is employed, such as hydrochloric acid. A related repair method for replacing a worn or damaged chromide coating is described. The coating is often applied to portions of turbine engine components made from superalloy materials. |
