Evaluation of a high resistance paint coating with EIS measurements: Effect of high AC perturbations

被引：38

作者：

Akbarinezhad, E. ^{[1
]}

Rezaei, F. ^{[1
]}

Neshati, J. ^{[1
]}

机构：

[1] RIPI, Dept Corros, Tehran, Iran

来源：

PROGRESS IN ORGANIC COATINGS | 2008年 / 61卷 / 01期

关键词：

EIS; high resistance paint coating; AC perturbation;

D O I：

10.1016/j.porgcoat.2007.09.004

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Electrochemical impedance spectroscopy (EIS) was used to evaluate a high resistance paint coating immersed in 10% sodium chloride solution. Although this method was valuable in evaluating this type of coating there were many fluctuations in measured data at low AC perturbations. In this work the role of high AC perturbation to fit EIS data of high resistance coating with equivalent electrical circuit (EEC) was studied. EIS measurements showed that these fluctuations could be reduced by high AC perturbation. The impedance plots showed best fitting at 400mv AC perturbation at the initial time of immersion and at 100 mV AC perturbation after 90 days of immersion. The coating resistance and coating capacitance were extracted from the Bode and Nyquist plots during the period of 90 days of immersion. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：45 / 52

页数：8

共 26 条

[1] EIS study of the corrosion behaviour of zinc-based coatings on steel in quiescent 3% NaCl solution. Part 1: directly exposed coatings [J].