Experimental Investigation of Aluminum/Epoxy Interfacial Properties in Shear and Tension
- 1 February 1996
- journal article
- research article
- Published by Taylor & Francis in The Journal of Adhesion
- Vol. 55 (3) , 303-316
- https://doi.org/10.1080/00218469608009954
Abstract
This paper presents the results 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.Keywords
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