Effect of temperature & bulk stirring on electroplating of brass from pyrophosphate electrolyte

Using the electrochemical quartz crystal microbalance, brass electroplated from a pyrophosphate electrolyte was examined. The effects of increased tem perature and bulk stirring on the plating current, the current efficiency, the partial current and the composition of the deposit during brass electro plating were measured for two different ratios of copper to zinc in the ele ctrolyte. Increasing temperature caused an increase in partial current dens ities but no significant change in current efficiencies, which stayed well below 100%, Bulk stirring increased the current densities, current efficien cies and copper content of the deposited brass.