Methods of using halogen-containing organic compounds to remove deposits from internal surfaces of turbine engine components
US7846261B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2006 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Jun 10, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/045
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Methods for cleaning surface deposits, such as sulfidation deposits or dust particles, from a surface bounding an internal passage in a turbine engine component. The surface deposits are cleaned by placing a halogen-containing organic compound, such as a fluorine-containing organic compound, into the internal passage and heating the component and organic compound to chemically react the halogen-containing species in the liquefied and boiling organic compound with the deposits. The temperature is further elevated to vaporize the chemically-modified deposits, which are moved by mass transport through the internal passage and out of the turbine engine component. An optional protective coating, such as a chromium or aluminum coating, may be applied to the cleaned surface of the internal passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.