Selective electrolytic stripping of metal coatings from base metal substrates
US4678552A · kind A · utility
41Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1986 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Apr 22, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/067
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Metal coatings are stripped from base-metal substrates in an electrolytic process employing an aqueous solution of alkanesulfonic acid of 1 to 4 carbons as the electrolyte at a concentration of from about 45 to about 70 weight percent, the coated base-metal substrate as the anode, and an electroconductive cathode, by impressing an electromotive force across the solution between the electrodes until the current decreases to zero which occurs when the metal coating on the anodic material is depleted and the base-metal substrate is left exposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.