Electrodeposition of chromium from trivalent chromium using modulated electric fields
US10100423B2 · kind B2 · utility
1Cited by
14References
14Claims
0Family size
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Key dates
| Filing date | Aug 14, 2015 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Nov 25, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/627
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A layer of chromium metal is electroplated from trivalent chromium onto an electrically conducting substrate by immersing the substrate and a counter electrode in a electroplating bath and passing a modulated electric current between the electrodes. In one embodiment, the current contains pulses that are cathodic with respect to said substrate and in another embodiment the current contains pulses that are cathodic and pulses that are anodic with respect to said substrate. The cathodic pulses have a duty cycle greater than about 80%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.