Polyaniline-dioctyl phosphate salt for corrosion protection of iron

Dioctyl phosphate doped polyaniline (PANI-DOPH) was incorporated as active pigment in various resins. These were coated on MS panels, the coating was characterized and the resistance to corrosion was studied. FTIR spectra revealed the formation of an oxide layer on MS surface. Adhesion strength of the coating was found to decrease marginally after incorporating polyaniline. Impedance measurement and humidity cabinet exposure indicate that 5 phr PANI-DOPH containing epoxy coating offers protective performance for longer period compared to other resins. Field exposure study carried out in surf zone exhibited similar phenomena.