METHODS FOR TREATING A FERROUS METAL SUBSTRATE (English)

2013
  • Patent  /  Electronic Resource

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Disclosed are methods for treating and coating a ferrous metal substrate, such as cold rolled steel, hot rolled steel, and electrogalvanized steel. These methods include contacting the ferrous metal substrate with an aqueous pretreatment composition comprising: (a) a Group IIIB and/or IVB metal compound; (b) phosphate ions; and (c) water. Also disclosed are off-shift methods of removing iron from the pretreatment bath.

  • Title:
    METHODS FOR TREATING A FERROUS METAL SUBSTRATE
  • Patent number:
    US2013213896
  • Application date:
    2013-03-06
  • Patent applicant:
  • Patent family:
  • Author / Creator:
  • Publisher:
    Europäisches Patentamt
  • Year of publication:
    2013
  • Type of media:
    Patent
  • Type of material:
    Electronic Resource
  • Language:
    English
  • Classification:
    IPC:    C02F Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm, TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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