Abstract
The mixing of chlorine into chrome plating bath is unavoidable in the process of decorative chrome plating.In this paper, it is reported mainly on the absorptiometric method by nitric acid saturated with silver chromate as well as the behavior of chlorine in chrome plating solution.In chromic acid solution, suspension is quantitatively formed by the reaction of the acid solution with Cl by adjusting the temperature and the concentration of nitric acid, and the absorbance can be measured at 800mμ with no effects of chromic acid.A process of reducing chlorate into chloride is essential for the estimation of chlorate.The content of chlorate is determined by the difference between the absorbance of reduced solution and that of original solution.The above method gives a good result for the simple and rapid analysis of a small amount of chlorine in chrome plating bath.
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