Filtering liquid phosphatizing liquid comprises directly introducing additive to liquid added to filtering device

摘要

Filtering a liquid phosphatizing liquid comprises directly introducing an additive to the liquid added to a filtering device. An Independent claim is also included for a device for carrying out the filtering process comprising a process container (2) containing the liquid and connected to a filtering device (1) via a feed line (3). The filtering device contains a filter medium through which the liquid passes. The feed device has a branch (3a) for introducing the additive directly before the filtering device. Preferred Features: The additive is iron (III) chloride and is introduced only at the start of the filtration process. The branch is connected via a line (8) to a storage container (10) for the additive. A flow meter is arranged in the feed line (3).