ELECTRICAL AND ELECTROCHEMICAL MEASUREMENTS AS PREDICTORS OF CORROSION AT THE METAL-ORGANIC COATING INTERFACE

被引：161

作者：

LEIDHEISER, H

机构：

[1] Center for Surface and Coatings Research, Lehigh University, Bethlehem, PA

来源：

PROGRESS IN ORGANIC COATINGS | 1979年 / 7卷 / 01期

关键词：

D O I：

10.1016/0300-9440(79)80038-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Five types of electrical and electrochemical measurements are reviewed: D.C. electrical properties, A.C. resistance, capacitance, corrosion potential, and polarization curves. When the coating resistance decreases with time and falls below 106 to 107 ohms/cm2, corrosion beneath the coating is occurring at a significant rate. A low electrical resistance requires (a) ion and water penetration into the coating, (b) ready motion of ions through the coating, and (c) proceeding ionic/electron transfer reactions (corrosion) at the polymer-metal interface. Care must be taken when making electrical measurements that the measurement itself does not affect the corrosion rate. © 1979.

引用

页码：79 / 104

页数：26

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