Abstract
The damage sustained by carbon fibre reinforced polymers due to the effect of galvanic corrosion induced by coupling between carbon fibres and a metallic material in a hybrid joint is investigated. Composite laminates with two fibre architectures and two thermoplastic matrices (polycarbonate and polyamide 6) are coupled to a metallic fastener and exposed to salted fog conditions. Both the effects of the salted fog environment and the coupled effect of the environmental and the galvanic corrosion are analysed. The analysis is centred in, firstly, characterising the functional properties of the hybrid joint, secondly characterising the laminate properties and finally characterising the chemical degradation of the matrix. The results show a degradation of properties for the polycarbonate material, in terms of bearing performance and interlaminar shear strength as well as presenting obvious changes in the thermal characterisation. The polyamide composites remain largely unaffected and only minor changes in the surface appearance are noteworthy.
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