Composition for stripping nickel from substrates and process
US6642199B2 · kind B2 · utility
3Cited by
14References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | May 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A nickel stripping composition is disclosed. The composition can be contacted with a nickel plated article in an aqueous solution in order to remove the nickel. In accordance with the present invention, besides an oxidizing agent, the composition includes the combination of an organic amine and citric acid or salt. Alternatively, other amines containing particular substituent groups can be present in the solution in order to increase the nickel holding capacity of the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.