Patent · US Expired

Zinc electroplating bath

US4135992A · kind A · utility

5Cited by

7References

2Claims

0Family size

Assignee

BASF SE

Inventors

Rolf Fikentscher · Ludwigshafen, DE
Klaus Glaser · Mutterstadt, DE
Guenther Gotsmann · Bischofswerda, DE
Werner Streit · Worms, DE

Key dates

Filing date	Nov 16, 1977
Grant date	Jan 23, 1979
Priority date	—
Expiry date	Nov 16, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25D3/22
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

An aqueous cyanide-free alkaline zinc bath for electroplating metallic surfaces with mirror-bright zinc coatings, which bath contains zinc ions, alkali metal hydroxides and, as the brightener, a polyalkylenepolyamine which is at least partially alkylated, with alkyl of 1 to 3 carbon atoms, at the basic nitrogens.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.