Method of coating an iron-based article
US9506136B2 · kind B2 · utility
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12References
16Claims
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Key dates
| Filing date | Sep 13, 2012 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | May 28, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C12/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of coating an iron-based article includes a first heating step of heating a substrate that includes an iron-based material in the presence of an aluminum source material and halide diffusion activator. The heating is conducted in a substantially non-oxidizing environment, to cause the formation of an aluminum-rich layer in the iron-based material. In a second heating step, the substrate that has the aluminum-rich layer is heated in an oxidizing environment to oxidize the aluminum in the aluminum-rich layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.