Electrochemical behavior of mild steel coated by polyaniline doped with organic sulfonic acids

A comparison of electrochemical behavior was made of coatings of pure undoped PANI cast from solution and this coating after doping as a film on the substrate. These were also compared to coatings of pure PANI/sulfonic acids adducts formed from the outset in the doped state through casting from xyle...

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Bibliographic Details
Published in:	Synthetic metals Vol. 107; no. 2; pp. 111 - 115
Main Authors:	Pud, A.A., Shapoval, G.S., Kamarchik, P., Ogurtsov, N.A., Gromovaya, V.F., Myronyuk, I.E., Kontsur, Yu.V.
Format:	Journal Article
Language:	English
Published:	Lausanne Elsevier B.V 30-11-1999 Amsterdam Elsevier Science New York, NY
Subjects:	Applied sciences Corrosion Corrosion prevention Electrochemical behavior Exact sciences and technology Forms of application and semi-finished materials Metals. Metallurgy Organic sulfonic acids Polyaniline Polymer industry, paints, wood Sheets and films Technology of polymers Organic sulfonic acids Polyaniline Electrochemical behavior Conducting polymers Corrosion protective layer Mild steel Coating material Electrochemical corrosion Doped polymer Experimental study Mechanism of action Corrosion protection Sulfonic acid Comparative study Aniline polymer
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Summary:	A comparison of electrochemical behavior was made of coatings of pure undoped PANI cast from solution and this coating after doping as a film on the substrate. These were also compared to coatings of pure PANI/sulfonic acids adducts formed from the outset in the doped state through casting from xylene or chloroform solutions. The results obtained allowed to assume that the formation of protective iron oxide layers occurs mainly during the coating of pure undoped PANI (emeraldine base). During the doping stage a modification of these layers obviously proceeds leading to a change of the corrosion currents of the whole coating system. As a consequence, the formation of pure doped PANI coatings by casting doped PANI from solutions cannot give as good of results as does the two stage process.
ISSN:	0379-6779 1879-3290
DOI:	10.1016/S0379-6779(99)00155-1