Process for removing aluminum-silicon coatings from metallic structures, and related processes for preparing magnetic components
US9803139B1 · kind B1 · utility
9Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | Jun 24, 2016 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Jun 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/147
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for selectively removing an aluminum-silicon coating fired on a surface of a metallic structure is described. The method includes the step of contacting the coating with molten potassium hydroxide (KOH), under conditions sufficient to remove the coating without substantially affecting the metallic surface. Methods for preparing a magnetic component are also described. They involve masking pre-selected regions of the surface of the component, using an aluminum-silicon coating that is fired onto the surface, prior to a nitriding step. The coating is then removed according to the procedure outlined herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.