There's a reference in this page about French traditional songs to "ballads about the corsairs".

And the 19th Century Romantics used to see Corsairs as glamorous and picturesque - Byron wrote a poem called The Corsair, which later became a ballet.

And here is an extract from this year's Hay on Wye (literary) Festival programme: Captives: Britain, Empire and the World 1600–1850 Linda Colley talks to Christopher Hitchens The historian discusses her stories of the flipside of Imperialism: the soldiers ans settlers seized in India and North America, the men and women captured from Devon and Cornwall by Moroccan slavers, or taken at sea by Barbary corsairs. She explores the parallels with empire today, and the West's relationship with Islam.

All the makings - but no sign of any folk songs, so far.