Henkel Ag & Company, Kgaa

Berhard Kotschy

Peter Kuhm

Matthias Hamacher

Metal surfaces are contacted with a solution of a process bath (,), for example a phosphating or pickling solution, which comprises several components in aqueous solution, the composition of the process bath (,) being maintained within a given range by addition of solutions or gases, in particular air. The profitability is improved considerably if the solution of the process bath (,) is circulated via a first line (,) and a circulating pump (,) and the solution to be added and/or the gas to be added is fed to the process bath where, as a consequence of the ending of the line (,), vigorous thorough mixing prevails, or if the solution to be added or the gas to be added is fed to a suction pump (,), the solution to be added or the gas to be added mixing with the circulated solution.

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Mettmann, Germany

Berhard Kotschy