Patents Assigned to Henkel Kommanditgesellschaft fur Aktien
  • Method for controlling the coating weight for strip-phosphating
    Patent number: 6461450
    Abstract: A process for controlling the layer weight during the phosphating of steel strip zinc-coated on one or both sides, using a phosphating solution which contains 1 to 6 g/l zinc ions and 10 to 30 g/l phosphate ions, characterized in that a Fe(II) ion content within the range of 3 to 100 mg/l is established in the phosphating solution. The higher the Fe(II) content, the lower is the layer weight. An alteration in the Fe(II) content of 3 to 20 mg/l results in an alteration in the layer weight of about 0.1 g/m2.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: October 8, 2002
    Assignees: Henkel Kommanditgesellschaft fur Aktien, Thyssen Krupp Stahl AG
    Inventors: Joerg Riesop, Franz-Gerd Ricke, Frank Panter, Dieter Geruhn, Hubertus Peters, Manfred Wessel, Andreas Klare