Anilinium 5-sulfosalicylate electropolymerization on mild steel from an aqueous solution of sodium 5-sulfosalicylate/disodium 5-sulfosalicylate |
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Authors: | G N Ćirić-Marjanović B N Marjanović M M Popović V V Panić V B Mišković-Stanković |
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Institution: | (1) University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia;(2) Centrohem, Karadjordjeva 129, 22300 Stara Pazova, Serbia;(3) University of Belgrade, Karnegijeva 4, P.O. Box 3503, 11120 Belgrade, Serbia;(4) University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia |
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Abstract: | Aniline is electropolymerized on bare and chemically pretreated mild steel from an aqueous solution of 0.10 M anilinium 5-sulfosalicylate
in 0.20 M sodium 5-sulfosalicylate/0.20 M disodium 5-sulfosalicylate buffer as the supporting electrolyte, at room temperature.
At constant anodic potential black poly(anilinium 5-sulfosalicylate) (PANISSA) films are obtained on bare mild steel and characterized
by IR spectroscopy, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). IR spectroscopic
analysis confirms typical polyaniline structure with 1,4-disubstituted aromatic nuclei and incorporation of sulfosalicylate
anions as dopants. Adhesion of PANISSA films is significantly improved when the mild steel electrode surface is chemically
pretreated by 0.10 M ammonium peroxydisulfate aqueous solution. The IR spectra of the films obtained on chemically pretreated
mild steel surface indicate an interaction between PANISSA and products of the mild steel oxidation by peroxydisulfate. The
SEM images show differences in morphology between PANISSA films synthesized on bare and chemically pretreated mild steel surface.
The efficient anticorrosion behavior of adherent PANISSA film on chemically pretreated mild steel is proved by EIS.
Published in Russian in Elektrokhimiya, 2006, Vol. 42, No. 12, pp. 1497–1504.
Based on the report delivered at the 8th International Frumkin Symposium “Kinetics of the Electrode Processes.” October 18–22,
2005, Moscow.
The text was submitted by the authors in English. |
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Keywords: | conducting polymers electrochemical synthesis doping poly(anilinium 5-sulfosalicylate) mild steel surface treatment corrosion |
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