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Non-toxic corrosion-protection rinses and seals based on rare earth elements

  • US 7,422,793 B2
  • Filed: 07/23/2003
  • Issued: 09/09/2008
  • Est. Priority Date: 01/04/2002
  • Status: Expired due to Term
First Claim
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1. A solid corrosion-inhibiting seal formed on a coating selected from anodic coatings, phosphating coatings, or black oxide coatings, the solid corrosion-inhibiting seal comprising a rare earth element and an inorganic valence stabilizer combined to form a rare earth/valence stabilizer complex within the solid corrosion-inhibiting seal, wherein the rare earth element is selected from cerium, praseodymium, terbium, or combinations thereof and at least one rare earth element is in the tetravalent oxidation state in the rare earth/valence stabilizer complex in the solid corrosion-inhibiting seal.

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