Process and composition for the electrodeposition of tin and tin

Details Process and composition for the electrodeposition of tin and tin Process and composition for the electrodeposition of tin and tin

1981-06-16

1983-04-26

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204435, 204 54R, C25D 332, C25D 360

Patent

active

043812287

ABSTRACT:
An electroplating bath for the high speed deposition of bright metallic tin utilizing tin fluoroborate and sulfuric acid as the electrolyte; wherein, in addition to certain other additives, the bath contains a perfluoroalkyl sulfonate wetting agent to promote anode corrosion. Brighteners used in the system include aromatic amines and aliphatic aldehydes. For certain purposes it may be advantageous to include boric acid as part of the electrolyte; and, in other instances, to use an aromatic sulfonic acid to enhance bath stability and brightness. The method for utilizing a bath containing tin fluoroborate in a sulfuric acid matrix containing these perfluoroalkyl sulfonate wetting agents is also described.

REFERENCES:
patent: 3002901 (1961-10-01), Seyb
patent: 3677907 (1972-07-01), Brown et al.
patent: 3917486 (1975-11-01), Schneble

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