Anticorrosion Property of Secondary Doped Polyaniline

Polyaniline prepared by chemical oxidation polymerization was doped secondarily with various functional proton acids.The solubility of doped polyaniline was studied.Open circuit potential (OCP) and polarization curves test were employed to characterize the anticorrosion performance of polyaniline/epoxy coatings.The results indicated that polyaniline doped with sodium dodecyl benzene sulfonate (DBSA) had the best corrosion resistance,and the OCP of this polyaniline coating was 100 mV higher than that of the blank sample.