Corrosion Studies of Electrodeposited Polypyrrole Coatings on Al 2024-T3 Alloy

摘要

Electroactive conductive polymers(ECPs)are being investigated for corrosion protection of structural alloys,with a view toward replacement of chromate-hased coating systems.However,the formation of uniform,well-adherent coatings of ECPs on active metals is a challenge.Our laboratory has developed a method for the direct galvanostatic electrodeposition of polypyrrole(Ppy)coatings on Al 2024-T3 alloy using an electron transfer mediator(4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt,also known as Tiron~R).