The corrosion-inhibiting effect of polypyrrole films doped with p-toluene-sulfonate, benzene-sulfonate or dodecyl-sulfate anions, as coating on stainless steel in NaCl aqueous solutions

Vera, Rosa; Schrebler, Ricardo; Grez, Paula; Romero, Hugo

Abstract

This article presents a study of the conditions for electro-synthesis of polypyrrole (PPy) films on stainless steel, in the presence of the anions p-toluene-sulfonate (pTS), benzene-sulfonate (BS) or dodecyl-sulfate (DS). Cyclic voltammetry (CV) was used in the synthesis of the polypyrrole films on the stainless steel (SS). These polymeric films were characterized by IR and UV-vis spectroscopy and their morphology and thickness were analyzed by scanning electron microscopy (SEM). Their performance as protective films against corrosive processes presented by the SS/PPy-pTS, SS/PPy-BS or SS/PPy-DS systems was evaluated in 0.1 M NaCl aqueous solution. The study of the corrosion processes of the stainless steel/polymer systems was conducted through measurements of open circuit potential (E-ocp), polarization curves (PC) and electrochemical impedance spectroscopy (EIS). The results showed that the protective capacity of these polymeric systems on stainless steel, mainly with regard to pitting, depends on the nature of the anion dopant used during electro-synthesis of the PPy film. The best performance was seen with the dopants pTS and BS. (C) 2014 Published by Elsevier B.V.

Más información

Título según WOS: The corrosion-inhibiting effect of polypyrrole films doped with p-toluene-sulfonate, benzene-sulfonate or dodecyl-sulfate anions, as coating on stainless steel in NaCl aqueous solutions
Título de la Revista: PROGRESS IN ORGANIC COATINGS
Volumen: 77
Número: 4
Editorial: ELSEVIER SCIENCE SA
Fecha de publicación: 2014
Página de inicio: 853
Página final: 858
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0300944014000162
DOI:

10.1016/j.porgcoat.2014.01.015

Notas: ISI - This publication is ISI DOI: 10.1016/j.porgcoat.2014.01.015