C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
324/23, 324/26
C25D 21/12 (2006.01) C25C 7/06 (2006.01) G01N 27/416 (2006.01)
Patent
CA 1277370
ABSTRACT OF THE DISCLOSURE: A method of and an apparatus for measuring 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, where the concentration is electri- cally measured. In order to permit an improved and more reliable check of the effectiveness of the inhibitor and to permit a controlled supply of make-up inhibitors at the re- quired 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 plot- ted cathode potential-time curve in the range from 0.1 to 50 minutes is taken as a measure of the effective concentration 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 concentra- tion of brightener in the electrodeposition of metal.
566896
Kunst Gunther
Langner Bernd
Reinking Ernst-Friedrich
Stantke Peter
Norddeutsche Affinerie Aktiengesellschaft
Robic
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