Effect of surface treatment on enhancing the interfacial bond between aluminum and epoxy

R. G. Albers, S. R. White

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Methods for the improvement of the interfacial bonding of aluminum and epoxy are discussed and tested experimentally. Current adhesion procedures are reviewed. The use of an epoxy adhesive film as an interface coupler and a method of anodizing the aluminum in phosphoric acid to create a favorable oxide surface are discussed. Adhesion through silane coupling agents is also studied, as a strong covalent chemical bond can be developed. Experimentally, seven different surface treatments and combinations of those treatments are tested in shear. The interfacial shear strength of the bond is tested in a manner resembling a fiber pull-out test. A half-inch diameter aluminum rod with the appropriate surface treatment is embedded in a cylinder of epoxy. Results show that mechanical types of adhesion enhancement, such as knurling and phosphoric acid anodizing, have the greatest ability to increase the shear strength of the interface. A corrosion-inhibiting primer in conjunction with an adhesive film also showed significant strength improvement.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites
PublisherPubl by Technomic Publ Co Inc
Pages587-596
Number of pages10
ISBN (Print)0877629978
StatePublished - Dec 1 1992
EventProceedings of the 7th Technical Conference of the American Society for Composites - University Park, PA, USA
Duration: Oct 13 1992Oct 15 1992

Publication series

NameProceedings of the American Society for Composites

Other

OtherProceedings of the 7th Technical Conference of the American Society for Composites
CityUniversity Park, PA, USA
Period10/13/9210/15/92

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemical Engineering (miscellaneous)
  • Building and Construction
  • Polymers and Plastics

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