Abstract
Polyacrylamides have been tested as inhibitors for copper electrowinning from an acidic copper sulfate bath on a copper cathode. The quality of the deposit, the structure, the galvanic potential, the current efficiency, the orientation of the texture and the amount of occluded inhibitor are determined as functions of the anionic or cationic character and of the viscosity of the polyacrylamide solutions. All the results are compared with those obtained with the commonly used guar gum.
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