Trivalent Chromium Solutions for Sealing Anodized Aluminum

Abstract

Corrosion resistant seal-coatings are formed on anodized aluminum by immersion in aqueous solutions containing trivalent chromic compounds with an alkali added near or slightly beyond the precipitation of insoluble basic compounds. Trivalent chromium seals formed on the anodized aluminum when tested in 5% NaCl salt spray chamber showed improved corrosion resistance. After a post-treatment in a peroxide or permanganate solution, the corrosion resistance for the anodized aluminum showed even greater improvement in the salt chamber.

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Document Details

Document Type
Technical Report
Publication Date
Dec 20, 1994
Accession Number
ADD019813

Entities

People

  • Fred Pearlstein
  • Vinod S. Agarwala

Organizations

  • United States Department of the Navy

Tags

DTIC Thesaurus Topics

  • Alkali Metals
  • Aluminum
  • Aluminum Alloys
  • Anodic Coatings
  • Aqueous Solutions
  • Chromium
  • Chromium Compounds
  • Coatings
  • Corrosion
  • Corrosion Inhibition
  • Corrosion Resistance
  • Environment
  • Films
  • Materials
  • Metals
  • Precipitation
  • Resistance

Readers

  • Surface Engineering/Surface Coating Technology.