Protection of components from corrosion
US11015252B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 22, 2019 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Feb 22, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2462
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Using the systems and methods discussed herein, CMAS corrosion is inhibited via CMAS interception in an engine environment and/or is prevented or reduced by the formation of a metal oxide protective coating on a hot engine section component. The CMAS interception can occur while the engine is in operation in flight or in a testing or quality control environment. The metal oxide protective coating can be applied over other coatings, including Gd-zirconates (GZO) or yttria-stabilized zirconia (YSZ). The metal oxide protective coating is applied at original equipment manufacturers (OEM) and can also be applied in-situ using a gas injection system during engine use in-flight or during maintenance or quality testing. The metal oxide protective coating contains a rare earth element, aluminum, zirconium, chromium, or combinations thereof, and is from 1 nm to 3 microns in thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.