Composites
vfr440
You touch on a topic that annoys me. Most industry and the FAA consider "composites" to mean the fibre-reinforced material as well as adhesive bonding. I have never understood why. The analytical methods and failure modes and purpose of use are completely different. The only commonality is that they both start off as sticky materials which when cured form a structural material. I would really prefer that composite materials (fibre-composites) and composite construction (bonded structures) were treated completely separately.
Now to answer the question I think you are asking: Does hydration occur in bonds between adhesives and fibre composites? The answer is that I have no evidence to support the proposition, but equally I have some suspicions that it may. The mechanism may not be hydration of oxide layers, but it may well be hydration of polymeric bonds, but this is pure supposition.
Regards
Blakmax