Zinc Chloride Content Analysis Methods and Special Reagent in Acidic Galvanized Solution
In recent years, because the quality of chemical materials in markets exists large difference, we found concentrations of ZnCl2 unusually high, Cl- concentration not lower and a serious shortage of KCl concentration as using traditional methods to analyze the bath. This phenomenon occured frequent. The companies that had problems were recommended to take measures to dilute ZnCl2 concentration range in 60 ~ 80g/l and add KCl and H3BO3 to the normal scope according to analysis results. However, the old problems still remained when the adjusted solution was analyzed again. The concentration of each main salt cannot be exactly determined by traditional methods because of the serious impurity contamination in the acidic galvanized solution. The concentration of ZnCl2, KCl, H3BO3 in the bath were respectively tested by new analysis methods. A comparision of the results by new methods with those by traditional methods shows that the new analysis methods are simple, fast, and have low consumption, high accuracy and good effects in practical production.
H. Wang "Zinc Chloride Content Analysis Methods and Special Reagent in Acidic Galvanized Solution", Key Engineering Materials, Vols. 474-476, pp. 335-338, 2011