Process for improving wear on conductor rolls in electroplating of steel surfaces
US4840712A · kind A · utility
1Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Oct 13, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to an improvement in a process for electrodepositing a protective coating of zinc or a zinc alloy on steel or other metal substrates in which the process utilizes a metal conductor roll or conductor roll with metal sleeves and contains a rinsing bath with a mineral acid solution associated with the roll, the improvement comprises providing at least 50 ppm of hydrogen peroxide or a peroxydisulfate compound in the mineral acid bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.