Abstract
In order to obtain a satisfactorily decorative chromium plating from oxalic acid baths, effects of total chromium concentration, Cr6+ concentration, SO42- ion, NH4+ ion, pH, temperature and current density on the states of chromium electrodeposition were studied. The followings were determined as optimum. Bath composition; total Cr 100g/l, Cr6+ 12-38g/l, (NH4)2SO4 75g/l, and operating conditions; pH 1.8-2.5, current density of 10-300A/dm2 at bath temperature 25-50°C or 20-300A/dm2 at 60-80°C, carbon anode.
