Experimental investigation of aluminum/epoxy interfacial properties in shear and tension

R. G. Albers, S. R. White

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the reults of comprehensive testing to characterize the effect of several different surface treatments on shear and tensile bond strength between 7075-T6 aluminum and two epoxy systems: EPON 815/V40 and EPON 828/Z. A rod pull-out test was used to determine interfacial shear strength, modeled after similar tests on reinforced concrete. The tensile bond strength was characterized using a tension test fixture designed in this study. Overall, the interfacial shear strengths were higher than the tension strengths. Surface knurling gave the highest interfacial shear strength, representing a 72% increase over untreated specimens. Phosphoric acid anodization (PAA) was also quite effective in shear. In tension, the highest strength was obtained from specimens treated with the PAA process along with a silane coupling agent. These specimens showed an increase in interfacial tensile strength by a factor of 5.6.

Original languageEnglish (US)
Pages (from-to)303-316
Number of pages14
JournalJournal of Adhesion
Volume55
Issue number3-4
DOIs
StatePublished - 1996
Externally publishedYes

Keywords

  • Adhesive bonding
  • Adhesive films
  • Aluminum surface treatments
  • Aluminum/epoxy interface
  • Interfacial shear strength
  • Interfacial tensile strength
  • Phosphoric acid anodization
  • Silane coupling agent

ASJC Scopus subject areas

  • General Chemical Engineering
  • Computational Mechanics
  • Mechanics of Materials
  • General Materials Science

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