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.
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