Inhibiting coke formation by heat treating in nitrogen atmosphere
US5298091A · kind A · utility
36Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces. The method includes heating at a temperature of 1800-1850 F. for about one hour, cooling to 1525-1575 F. and holding for about four hours, and cooling to a temperature of 1375-1425 F. and holding for about 16 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.