Available Treatments for Composite Surfaces

This section summarizes the surface treatments available and performed nowadays, with the adhesion theory they tend to improve. 

Most of the surface treatments aim to bring roughness on the adherend, in order to satisfy the mechanical adhesion theory proposed by McBain [1], which is mainly aimed to enhance the mechanical interlocking of the adhesive with the adherend. To this end, solid abrasion remains one of the most widespread techniques solid particles are directed onto the composite surface using different particle sizes at controlled impact speeds. This kind of treatment makes it possible 

Adhesion - Current Research and Application. WulfF Possart 

Copyright 2005 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 3-527-31263-3 

Another theoretical aspect of adhesion can be optimized with surface treatment. The interdiffusion theory described by Voyutski [6] involves the diffusion of macromolecular chains across a polymer interface. In this case the interface is transformed progressively to a wide interphase. Welding of composites is then the main technique that can enhance this particular aspect. This welding can be performed with ultrasonic, electric induction, or resistance techniques [7]. 

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