Abstract
Abstract To achieve adhesively bonded metal joints which are durable it is necessary to gain a better understanding of the processes (both on a macro- and a micro-scale) which take place at every stage of their preparation. In an attempt to elucidate a few of these aspects, the surfaces of two aluminium alloys — 2024 T3 and 7075 T6 — were examined using scanning electron microscopy after various etching and anodizing pretreatments. The effects of adsorption of a phenolic resin, used typically in a primer, on 2024 T3 aluminium were examined using spectrophotometric measurements. Finally, the effects of the ingress of water into joints formed by bonding the alloys with a cold-curing epoxy resin were studied.
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