Patents Assigned to Nihon Pakerizing Co., Ltd.
  • Aluminum heat exchanger
    Patent number: 4368776
    Abstract: An aluminum heat exchanger with excellent corrosion resistance and particularly suited for adaptation as radiator for automobiles, the heat exchanger having a 2- or 3-layer coating film structure consisting of a zinc-diffused layer formed on the surface of an aluminum base and a waterproof organic film formed on the zinc-diffused layer with or without a phosphoric acid-chromate coating therebetween, whereby the surface of the aluminum base is not directly contacted with at least the water-containing heat exchange medium is provided.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: January 18, 1983
    Assignees: Nippondenso Co., Ltd., Nihon Pakerizing Co., Ltd.
    Inventors: Junichi Negita, Yuichiro Yamada, Hideaki Kaneko, Takao Ogino