Method and composition for removing aluminide coatings from nickel superalloys
US4339282A · kind A · utility
30Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1981 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Jun 3, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F1/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Nickel aluminide and like coatings are stripped from nickel base superalloy substrates using a 60.degree.-71.degree. C. solution consisting essentially by volume percent of 43-48 nitric acid, 7-12 hydrochloric acid, balance water, and containing 0.008-0.025 mole/liter ferric chloride and at least 0.016 mole/liter copper sulfate. Coating removal is rapid while significant attack of the substrate is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.