Characterisation and corrosion protection properties of polypyrrole electropolymerised onto aluminium in the presence of molybdate and nitrate

被引：69

作者：

Lehr, IL ^{[1
]}

Saidman, SB ^{[1
]}

机构：

[1] Univ Nacl Sur, Dept Ingn Quim, Inst Ingn Electroquim & Corros, RA-8000 Bahia Blanca, Buenos Aires, Argentina

来源：

ELECTROCHIMICA ACTA | 2006年 / 51卷 / 16期

关键词：

aluminium; polypyrrole; electrodeposition; molybdate; corrosion;

D O I：

10.1016/j.electacta.2005.09.017

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This paper describes the first attempts for the electrosynthesis of polypyrrole films containing molybdate onto aluminium electrodes. Electrogeneration was carried out in an alkaline solution in the presence of molybdate, nitrate and the monomer. The optimum concentrations for electropolymerisation were chosen in order to improve the corrosion protection of the substrate. The coatings were characterised by SEM/EDX and IR spectroscopy and the cyclic voltammetric response of the film is discussed. Pitting corrosion resistance was studied by means of open circuit potential and potentiodynamic measurements. The results presented below show that molybdate remains entrapped into the polymer matrix, providing greater resistance to breakdown of passivity in chloride media. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：3249 / 3255

页数：7

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