Corrosion-resistant coated article and thermal chemical vapor deposition coating process
US12036765B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2021 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Aug 5, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C28/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Corrosion-resistant coated articles and a thermal chemical vapor deposition coating processes are disclosed. The article includes a metallic material having a first composition including a first iron concentration and a first chromium concentration, the first iron concentration being greater than the first chromium concentration, a surface of the metallic material having a second composition including a second iron concentration and a second chromium concentration, the second chromium concentration being less than the first chromium concentration, an oxide layer on the surface of the metallic material having a third composition including an iron oxide concentration and a chromium oxide concentration, the chromium oxide concentration being greater than the iron oxide concentration and being devoid of precipitates, and a thermal chemical vapor deposition coating on the oxide layer. The process includes producing the article by treating to produce the surface, oxidizing to produce the oxide layer, and applying the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.