Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Depositing predominantly alloy coating
Patent
1994-07-20
1996-07-09
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Depositing predominantly alloy coating
205253, 205254, C25D 358, C25D 360
Patent
active
055341292
ABSTRACT:
In order to produce bright to brilliant, leveled copper-tin alloy coatings, galvanic baths are used which contain 1 to 60 g/l copper in the form of copper(I) cyanide, 1 to 50 g/l tin in the form of alkali stannate, 0 to 10 g/l zinc in the form of zinc cyanide, 1 to 200 g/l of one or several complex binders (e.g., oligosaccharides and/or polysaccharides), 1 to 100 g/l free alkali metal cyanide, 1 to 50 g/l free alkali metal hydroxide, 0 to 50 g/l alkali metal carbonate 0.01 to 5 g/l brightener (e.g., alkene sulfonate, alkyne sulfonate, pyridine compounds or sulfur-containing propane sulfonates) and 0 to 100 mg/l lead as lead(II) acetate or lead(II) sulfonate.
REFERENCES:
patent: 2849352 (1958-08-01), Kirstahler et al.
patent: 2916423 (1959-12-01), Passal
patent: 4565608 (1986-01-01), Hoffacker et al.
patent: 5149566 (1992-08-01), Morton et al.
Chemical Abstracts, vol. 100, No. 12, 19 Mar. 1984, abstract No. 93503n.
Patent Abstracts of Japan C-122, 2 Sep. 1982, vol. 6, No. 169, abstract 57-82492A.
Hoffacker Gerd
Kaiser Hasso
Reissmueller Klaus
Wirth Guenter
Degussa - Aktiengesellschaft
Niebling John
Wong Edna
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