Protective coatings for alloys
US4938993A · kind A · utility
6Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Mar 29, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/56
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Aluminium-containing alloys are protected against high temperature corrosive attack by providing an amorphous silica coating, e.g. by plasma assisted vapor deposition, followed by heat treating under conditions such that a coherent, protective alumina coating or layer is formed on the surface of the alloy in place of the silica coating. The silica protects the alloy from corrosion initially and then acts as an oxidant source so that aluminium from the alloy can react to form the alumina coating. The alloy may be a superalloy such as a nickel-base superalloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.