IR and XPS studies on the interphase and poly(N-methylpyrrole) coatings electrodeposited on steel substrates

被引：49

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 / 19期

关键词：

poly(n-methylpyrrole) coatings; steel substrate; interphase; IR; XPS;

D O I：

10.1016/S0013-4686(99)00055-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Poly(N-methylpyrrole) coatings have been electrodeposited on steel substrates from aqueous oxalate solutions. The formation process of the coatings was found to be different between acidic and basic mediums. In an acidic medium, the reactions were characterized by two stages: formation of the passive interphase and electropolymerization of the N-methylpyrrole. The composition of the formed interphase and poly(N-methylpyrrole) coatings were examined by infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS). Our results show that the interphase formed in an acidic medium is composed of iron(II) oxalate dihydrate. The formation of poly(N-methylpyrrole) coatings on steel occurred after the passivation of steel was completed. Interaction between the poly(N-methyl pyrrole) coatings and the interphase is shown by the broadening of the -CO absorption peak. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：3321 / 3332

页数：12

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