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The question naturally arises as to what difference there might be in current-carrying
capacity between the solid and hollow anodes in a chromium plating bath. To answer that question the following experiment was conducted.
The two types of anodes were placed in the tank
under identical conditions, so that at any given voltage, the total current through the system will indicate overall differences in current characteristics between the two anodes. Plating
chromium on the cathode for a set length of time at a set current, the weight of chromium deposited, assuming 100 percent efficiency, can be calculated. The weight increases of the cathode allows
actual efficiency to be calculated. Then, by sectioning the cathode at intervals from the solution level down to the bottom, actual chromium deposited can be determined for each area and,
based on actual and theoretical current efficiencies, the distribution of current on the anode can be approximated.
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