Composition and process for treating tinplate
US5498300A · kind A · utility
9Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1995 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Jun 9, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/47
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
To impart an excellent corrosion resistance and adherence to the surface of tinplate while avoiding the production of sludge in the treatment bath during continuous treatment, a bath is used that contains phosphate ions, from 0.1 to 5.0 g/L of chelating agent, and tin ions; has a pH from 2.0 to 4.5; is essentially free of oxidizing agent and ferric ion; and has an oxidation-reduction potential of .ltoreq.450 mV more oxidizing than a silver-saturated silver chloride reference electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.