Morphology and structure of the passive interphase formed during aqueous electrodeposition of polypyrrole coatings on steel

被引：32

作者：

Su, WC ^{[1
]}

Iroh, JO ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Mat Sci & Engn, Cincinnati, OH 45221 USA

来源：

ELECTROCHIMICA ACTA | 1999年 / 44卷 / 26期

关键词：

electrodeposition; polypyrrole; passive interphase; morphology; unit cell dimension;

D O I：

10.1016/S0013-4686(99)00219-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An iron(II) oxalate dihydrate passive interphase was electrodeposited on steel substrate from aqueous oxalate solutions prior to the electrochemical polymerization of pyrrole. The effect of electrochemical process parameters on the morphology and structure of the passive interphase was systematically investigated by scanning electron microscopy(SEM) and X-ray diffractometry (XRD). Our results reveal that the passive interphase is composed of a monolayer of closely packed crystals. The size of the crystals is dependent on the experimental conditions. The iron(II) oxalate dihydrate interphase formed on steel by electrochemical deposition has an orthorhombic structure irrespective of the reaction condition. The unit cell dimensions of the passive interphase formed by electrodeposition are slightly different from those formed by conventional chemical process. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：4655 / 4665

页数：11

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