Chromate-Free Method of Preparing Aluminum Surfaces for Adhesive Bonding. An Etchant Composition of Low Toxicity

Abstract

In a continuing effort to minimize the use of toxic and hazardous materials for the adhesive bonding of aluminum, a suitable alternative for the standard chromate-containing FPL etchant is being sought. This has resulted in the development of a chromate-free etchant of minimal toxicity (etchant P2) which consists of an aqueous solution of sulfuric acid and ferric sulfate. Surfaces produced with the new etchant composition when adhesively bonded result in joint strengths comparable to those obtained with the standard chromated etchant. Adhesively bonded 6061-T4 alloy specimens prepared with the new etchant exhibited stress durabilities superior to those prepared with the standard FPL etchant. No difficulties are expected to result from the use of the new etchant under production conditions.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA056241

Entities

People

  • Elizabeth A. Garnis
  • William J. Russell

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Adhesive Bonding
  • Adhesives
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chromium Compounds
  • Engineering
  • Films
  • Joints
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Mechanics
  • Shear Tests
  • Test And Evaluation
  • Test Methods
  • Timing Devices

Fields of Study

  • Materials science

Readers

  • Medical Imaging.
  • Surface Engineering/Surface Coating Technology.