Aluminum slurry coatings and methods of their formation and use
US11925988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2021 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Aug 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2302/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods for reducing a concentration of hexavalent chromium within a first aluminum slurry by adding a reducing agent to form a second aluminum slurry are provided. The reducing agent causes a chemical reduction reaction with the hexavalent chromium compound of the first aluminum slurry to form a trivalent chromium compound within the second aluminum slurry such that a first weight ratio of hexavalent chromium to trivalent chromium in the first aluminum slurry is decreased to a second weight ratio of hexavalent chromium to trivalent chromium in the second aluminum slurry, with the second weight ratio being less than the first weight ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.