C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
324/24
C25D 21/12 (2006.01) G01N 27/42 (2006.01)
Patent
CA 1072632
A METHOD AND A DEVICE FOR EVALUATING THE QUALITY OF ELECTROPLATING BATHS ABSTRACT OF THE DISCLOSURE A working electrode is swept through a voltammetric cycle, including a metal plating range and a metal stripping range, for at least two baths of known plating quality and a bath whose quality is to be evaluated. The current utilized during the metal stripping range is correlated to the quality of the baths of known quality. The current utilized to strip the metal in the bath of unknown quality is compared to the correlation and its quality evaluated. In a preferred embodiment, an inert working electrode is swept by a function generator through the voltammetric cycle. A counter electrode immersed in the plating bath is coupled in series with the function generator and a coulometer to meas- ure the charge during the metal stripping portion of the cycle. - 1 -
293699
Ogden Cameron A.
Tench Dennis M.
Na
Rockwell International Corporation
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