Patents Assigned to Gerhard Collardin Gesellschaft mit beschraenkter Haftung
  • Method for activating metal surfaces prior to zinc phosphation
    Patent number: 4707193
    Abstract: A method for activating a metal surface during a phosphating process by treating the surface with an activating solution containing titanium ions, phosphate ions, and borate ions, after initial cleaning and rinsing but before phosphation.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: November 17, 1987
    Assignee: Gerhard Collardin Gesellschaft mit beschraenkter Haftung
    Inventors: Heinz Portz, Reinhard Opitz