Repair of a discrete selective surface of an article
US6274193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49318
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for restoring a protective coating including a metallic environmental resistant coating of a coating total thickness within a coating design thickness range on a metal substrate of an article includes the application of a replacement material to at least one discrete local surface area on which an undesirable amount of degradation has occurred. Such degradation can extend through the protective coating into the metal substrate. The degradation product can include at least one of oxidation, coating rumpling, and coating voiding, for example, rumpling or voiding of a bond coat under a ceramic thermal barrier coating (TBC). The degradation product first is conditioned at the discrete local area to expose an underlying portion while retaining at least a portion of the metallic environmental coating on surface areas adjacent the discrete surface area. Then a replacement metallic environmental resistant material is applied, retaining the coating total thickness within the coating design thickness range. If the protective coating includes a TBC, a replacement TBC then is applied over the replacement material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.