CHARACTERIZATION OF ORGANIC COATINGS ON METAL SUBSTRATES BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

被引：90

作者：

TITZ, J ^{[1
]}

WAGNER, GH ^{[1
]}

SPAHN, H ^{[1
]}

EBERT, M ^{[1
]}

JUTTNER, K ^{[1
]}

LORENZ, WJ ^{[1
]}

机构：

[1] UNIV KARLSRUHE,INST PHYS CHEM & ELEKTROCHEM,W-7500 KARLSRUHE,GERMANY

来源：

CORROSION | 1990年 / 46卷 / 03期

关键词：

Corrosion--Electrochemical - Electrochemistry - Electrolytic Analysis - Metals and Alloys--Protective Coatings - Protective Coatings--Spectroscopic Analysis;

D O I：

10.5006/1.3585095

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Organic coatings on phosphated and bare mild steel exposed to aqueous sodium chloride solutions were investigated by electro-chemical impedance spectroscopy (EIS). The corrosion protection of coatings is well characterized by a thorough transfer function analysis of the EIS data obtained. A quasi-homogeneous and two different inhomogeneous three-dimensional surface models were used to analyze perfect and imperfect coatings, respectively. Local defects within the organic coatings and delamination effects at the substrate/coating interface were determined quantitatively even after a relatively short exposure time.

引用

页码：221 / 229

页数：9

共 32 条

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