Accession Number : ADD005883

Title :   Chromate-Free Etching Process and Composition for Preparing Aluminum for Adhesive Bonding.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Russell,William J

Report Date : 11 Jul 1978

Pagination or Media Count : 6

Abstract : A chromate-free etching process and composition for treating aluminum parts to prepare a surface for durable adhesive bonding to other parts, which avoids the toxicity and disposal problems attending the use of conventional chromate containing etching baths. The process utilizes an etchant composition composed of an aqueous solution of nitric acid, alkali metal sulfate, ferric sulfate and preferably also sulfuric acid. (Author)

Descriptors :   *Patents, *Aluminum, *Adhesive bonding, Surface finishing, Etching, Chromates, Chemical composition, Surface properties, Toxicity, Waste disposal, Baths, Nitric acid, Alkali metal compounds, Sulfates, Iron compounds, Sulfuric acid

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE