Method and electrolyte for anodizing valve metals to high voltage
US6346185B1 · kind B1 · utility
16Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Oct 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of anodizing valve metals with a borate polyester solution formed by the combining 2-methyl-1,3-propane diol and boric acid and heating to about 130 to about 160° C. The heating drives off water produced by esterification. A substrate is immersed in the borate polyester electrolyte solution at a temperature of about 25° C. to about 85° C. and an anodizing voltage is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.