Volume 180, 2015

Corrosion protection of iron using porous anodic oxide/conducting polymer composite coatings

Abstract

Conducting polymers (CPs), including polypyrrole, have attracted attention for their potential in the protection of metals against corrosion; however, CP coatings have the limitation of poor adhesion to metal substrates. In this study, a composite coating, comprising a self-organized porous anodic oxide layer and a polypyrrole layer, has been developed on iron. Because of electropolymerization in the pores of the anodic oxide layer, the composite coating showed improved adhesion to the substrate along with prolonged corrosion protection in a NaCl aqueous corrosive environment. The anodic oxide layers are formed in a fluoride-containing organic electrolyte and contain a large amount of fluoride species. The removal of these fluoride species from the oxide layer and the metal/oxide interface region is crucial for improving the corrosion protection.

Associated articles

Article information

Article type
Paper
Submitted
24 Nov 2014
Accepted
22 Dec 2014
First published
22 Dec 2014

Faraday Discuss., 2015,180, 479-493

Corrosion protection of iron using porous anodic oxide/conducting polymer composite coatings

Y. Konno, E. Tsuji, Y. Aoki, T. Ohtsuka and H. Habazaki, Faraday Discuss., 2015, 180, 479 DOI: 10.1039/C4FD00232F

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