Patents Assigned to Alchem Corp.
  • Process for chromating surfaces of zinc, cadmium and alloys thereof
    Patent number: 5368655
    Abstract: There is described a process for chromating an article formed of a metal selected from the group consisting of zinc, cadmium and alloys thereof, which includes immersing the article in a water solution of a soluble chromic oxalate complex at a pH of from 1.2 to 3.0.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: November 29, 1994
    Assignees: Alchem Corp., Frederick Gumm Chemical Co., Inc.
    Inventor: Klaus P. Klos