Electrochemical behavior of mild steel coated by polyaniline doped with organic sulfonic acids

摘要

A comparison of electrochemical behavior was madeof coatings of pure undoped PANI cast from solution and thiscoating after doping as a film on the substrate. These were alsocompared to coatings of pure PANI/ sulfonic acids adducts formedfrom the outset in the doped state through casting from xylene orchloroform solutions. The results obtained allowed to assume thatthe formation of protective iron oxide layers occurs mainly duringthe coating of pure undoped PANI(emeraldine base). During thedoing stage a modification of these layers obviously proceedsleading to a change of the corrosion currents of the whole coatingsystem. As a the two stage process. 1999Elsevier Science S.A. Allrights reserved.