Chromic acid baths are used in metal working plants for plating and passivation of metal surfaces. A typical spent chromium plating bath contains about 300 g/L of chrmic acid and 25 g/L of Cu+2, Fe+3 and Cr+3 cause of the dissolution of a small amount of the metal piece being plated results in high current densities, decreased bright range,?increased tendency to burn, rough and pitted deposits. Even chromic baths used for aluminum are also can be treated cause they are having concentration of 100 g CrO3/L and 10 g Al2O3/L. This baths treated with ion exchange systems will have longer running life results in overall economic of the plant.