Electrolytic method for regenerating tin or tin-lead alloy stripping compositions
US4944851A · kind A · utility
39Cited by
17References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Jun 5, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C1/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aqueous solution of alkane sulfonic acid and inorganic nitrate used to strip metals from substrate surfaces, such as in stripping tin or tin-lead from copper surfaces, is regenerated by subjecting it to electrolysis to case dissolved stripped metals therein to deposit in metallic form on the surfaces of a cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.