Electrochemical synthesis of particulate-filled polyaniline (PANi) and polypyrrole (PPy) films on Al 2024-T3 was carried out under aqueous conditions. A variety of fillers including clay, carbon black (CB), short carbon fiber, YSZ, and SiO_2 were studied. Both cyclic voltammetry and constant current techniques were employed in electrochemical deposition of the filled conducting polymer composite coatings. To further improve the corrosion resistance of the coatings, multilayers of filled conducting polymer films were formulated. The amount of charge consumed during electrodeposition was obtained from the cyclic voltammograms. DC polarization tests were performed on the coated substrates in a 3.5 percent NaCl solution. The results showed that the presence of fillers such as clay, short carbon fiber and YSZ improved the corrosion resistance of PPy/PANi-coated aluminum. Multilayer coatings also showed significant enhancement in the corrosion performance of the coatings.
展开▼
