Electrocleaning process
US4039410A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Jun 7, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25F1/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for electrocleaning articles comprised of a substrate having a copper coating thereover to remove adherent and embedded contaminating carbon particles from the coating, rendering the article in suitable condition for further electroplating operations. The electrocleaning treatment includes immersing the article in an aqueous alkaline solution containing a controlled effective amount of an inorganic complexing agent possessed of copper solubilizing properties and effective to retain the solubilized copper in solution in the form of a complex. The article is cathodically electrified continuously or on an intermittent basis for at least a portion of the period while immersed in the aqueous alkaline solution to accelerate the solubilization of the copper and the dislodgment and removal of the contaminating carbon particles, whereafter the electrocleaned article is rinsed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.