Chemistry: electrical and wave energy – Processes and products
Patent
1988-05-18
1989-05-30
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 451, 204105R, 204106, 204225, 204402, 204406, 204411, 204434, G01N 2746
Patent
active
048348422
ABSTRACT:
The effectiveness of organic additives acting as inhibitors during the electrolytic deposition of metals from aqueous electrolytes, which contain organic additives for improving the deposition of metal, is electrically measured. In order to permit an improved and more reliable check of the effectiveness of the inhibitor and to permit a controlled supply of makeup inhibitors at the required rate, a partial stream of the electrolyte is supplied to flow at a constant velocity in a measuring cell provided with at least three wire electrodes having a fresh conductor surface, a measuring current of 5 mA to 1.0 A is supplied to the electrodes and is maintained, and the slope of the plotted cathode potential-time curve in the range from 0.1 to 50 minutes is taken as a measure of the effective conecentration of the inhibitor. The method can be used to measure the effective inhibitor concentration in an electrolyte used to electrorefine copper and to measure the effective conecentration of brightener in the electrodeposition of metal.
REFERENCES:
patent: 3356605 (1967-12-01), Schmidt
patent: 3925168 (1975-12-01), Costas
patent: 4479852 (1984-10-01), Bindra et al.
patent: 4631116 (1986-12-01), Ludwig
Kunst Gunther
Langner Bernd
Reinking Ernst-Friedrich
Stantke Peter
Dubno Herbert
Kaplan G. L.
Norddeutsche Affinerie Aktiengesellschaft
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