Electrodeposition of tin, lead and tin-lead alloys
US4000047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1974 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Dec 20, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A bath for the electrodeposition of bright tin-lead alloys which comprises an aqueous acidic bath containing at least one soluble tin compound and one soluble lead compound to which there has been added: PA1 A. a lower alkylene oxide condensation product, and PA1 B. an effective amount of at least one pyridine or quinoline compound having the structure ##STR1## wherein the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each is a hydrogen or halogen atom, a lower alkyl radical containing a hydroxyl group, an alkenyl radical, the radical (C.sub.n H.sub.2n --CO.sub.2 H in which n has a value from 0 to 6 or a carbamide radical or R.sub.4 and R.sub.5 combined form a divalent radical to provide a compound having the structure ##STR2## in which R.sub.6 is nothing or a hydroxyl radical; Z is nothing, 0.sup.- or a quaternary ammonium forming hydrocarbon radical provided that when Z is nothing, at least one of the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 is a halogen atom, a lower alkyl radical containing a hydroxyl group, an alkenyl radical, the radical (C.sub.n H.sub.2n --CO.sub.2 H in which n has a value from 0 to 6 or a carbamide radical or R.sub.6 is a hy…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.