Quality assurance in galvanising plants: in-process analysis of zinc baths

Zinc baths consist of almost 100 percent liquid zinc. To ensure a consistently high quality of the molten zinc, the chemical composition of the zinc bath should be checked at regular intervals to prevent quality defects in the zinc coating. Our experienced experts test the samples with a wet chemical analysis. The result provides an overview of the concentrations of the most typical trace elements aluminium (Al), bismuth (Bi), cadmium (Cd), copper (Cu), iron (Fe), nickel (Ni), lead (Pb), tin (Sn) with determination limits up to 10ppm. We also test for other elements on request.

We test liquid baths, such as degreasing, rinsing, pickling and flux baths, for the parameters hydrochloric acid (HCl), iron (Fe), zinc (Zn), ammonium (NH₄⁺), density, surface tension, pH value, iron (Fe), potassium (K), sodium (Na), nickel (Ni), lead (Pb), silicon (Si) as well as carbon and the calculation of zinc chloride (ZnCl₂), ammonium chloride (NH₄Cl) and total salt content.