Methods for creating a zinc-metal oxide layer in metal components for corrosion resistance
US11136660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2016 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Sep 8, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C1/003
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a method for manufacturing a finished metal object or product having a corrosion resistant layer integral to or within a top portion of at least one of its surfaces that would be exposed to a corrosive environment. In one embodiment, the method for manufacturing is directed to a finished metal tubing product having a corrosion resistant layer within its inside surface that is exposed to a fluid and wherein the corrosion resistant layer is a zinc-metal oxide layer, such as a zinc-chromium oxide layer, or a zinc-mixed metal oxide layer. In addition to methods of manufacturing, the present invention provides finished metal objects or products having a corrosion resistant layer integral to or within a top portion of at least one surfaces that would be exposed to a corrosive environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.