Polyaniline–dioctyl phosphate salt for corrosion protection of iron

• Published in: Progress in organic coatings Vol. 54; no. 3; pp. 263 - 267
• Main Authors: Samui, A.B., Phadnis, Swati M.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-11-2005; Elsevier Sequoia
• Subjects: Applied sciences; Coatings. Paints, varnishes and inks; Components, formulation; Corrosion; Corrosion mechanisms; Dioctyl phosphate; Exact sciences and technology; Metals. Metallurgy; Polyaniline; Polymer industry, paints, wood; Protective coatings; Polyaniline; Dioctyl phosphate; Protective coatings; Mild steel; Epoxy resin; Permeability; Experimental study; Coatings; Adhesion; Corrosion resistance; Humidity effect; Formulation; Pigments; Surface properties; Fourier transform spectra; Infrared spectrum; Performance; Aniline polymer
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2005.07.002

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.