Dr H said:..
That sounds interesting Peter. I recall some more modern experiments that were reported at sea in connection with the effects of galvanic corrosion on composites (on Sea Harriers, I think). When a composite component was placed in close proximity with an iron nail in a coke can (aluminium) filled with brine (salt water) galvanic corrosion took place - due to the difference in electrode potential/competition for electrons - leading to the breakdown of the polyimide polymer matrix (leading almost bare carbon fibres - a frightening thought on a marine composite aircraft). The polyimides are typically sensitive to hydrolysis/breakdown by alkali. I read that cellulose (the basis for the cotton) is sensitive to alkaline hydrolysis.
English translation?