Characterisation and corrosion studies of steel electrodes covered by polypyrrole/phosphotungstate using Electrochemical Impedance Spectroscopy

被引：11

作者：

Bonastre, J. ^{[1
]}

Garces, P. ^{[2
]}

Galvan, J. C. ^{[3
]}

Cases, F. ^{[1
]}

机构：

[1] Univ Politecn Valencia, Dept Ingn Text & Papelera, EPS Alcoy, Alcoy 03801, Spain

[2] Univ Alicante, Dept Ingn Construcc, OP, E-03080 Alicante, Spain

[3] CSIC, Ctr Nacl Invest Met, E-28040 Madrid, Spain

来源：

PROGRESS IN ORGANIC COATINGS | 2009年 / 66卷 / 03期

关键词：

Polypyrrole; Phosphotungstate; Carbon steel; Polymer coating; Electrochemical Impedance Spectroscopy; CONDUCTING POLYMERS; PART; 2; POLYPYRROLE; POLYANILINE; BEHAVIOR; IRON; ELECTROPOLYMERIZATION; COATINGS; PROTECTION; TRANSPORT;

D O I：

10.1016/j.porgcoat.2009.07.012

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Polypyrrole/PW12O403- hybrid material was electrosynthesised on carbon steel electrodes in acetonitrile medium. The coatings obtained were characterised by Electrochemical Impedance Spectroscopy (EIS). On free-standing polypyrrole films the electrical response was mainly due to ion-ion charge transfer resistance, with a value of 175 Omega cm(2). A value of 2 x 10(-5) S/cm was determined for the hybrid material conductivity. A charge transfer resistance about 7000 Omega cm(2) was obtained due to steel/oxide interface. Corrosion tests showed an important improvement in the protection against corrosion when the carbon steel electrodes were coated by these polymeric films. (C)09 Elsevier B.V. All rights reserved.

引用

页码：235 / 241

页数：7

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