The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1994
Filed:
Oct. 01, 1993
Applicant:
Inventors:
Fred Pearlstein, Philadelphia, PA (US);
Vinod S Agarwala, Warminster, PA (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
205203 ; 148276 ; 148267 ; 427343 ; 205201 ;
Abstract
Corrosion resistant seal-coatings are formed on anodized aluminum by immeon 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.