Effect of Rare Earth Additives on Chrome-Plating Quality

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The effect of rare earth additives used in chrome-plating on the electroplated coating behaviors of the luminosity, brightness, dispersibility of plating solution, deposition rate of ion and current efficiency were studied systemically by means of measuring cathode current at 20 and 50 ℃ respectively. The results show that rare earth additives increase the luminosity and brightness of the electroplated coating, dispersibility of plating solution, deposition rate of ion and current efficiency at 50 ℃. At 20 ℃, rare earth additives only increase the current efficiency and ion deposition rate. The most effective rare earth oxides additives are Pr6O11 and CeO2.
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