Patents Examined by Scovronek
  • Monitoring surfactant in electrolyte during metal treatment
    Patent number: 4165218
    Abstract: A technique for the quantitative monitoring of a nonionic surfactant, such as nonylphenolpolyglycolether, in an acid tinning bath for the production of shiny, pore-free coatings on components. A measured amount of bath fluid (a bath specimen) is diluted with distilled water and mixed with sulfuric acid, and this mixture is then immediately titrated with a tannic acid solution until opalescence occurs.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: August 21, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jacky Vanhumbeeck, Christiaan Vandenbossche