LONG-TERM TESTING OF EPOXY-COATED STEEL IN ASTM SEAWATER USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

被引：49

作者：

MURRAY, JN ^{[1
]}

HACK, HP ^{[1
]}

机构：

[1] DAVID TAYLOR RES CTR,MARINE CORROS BRANCH,ANNAPOLIS,MD 21402

来源：

CORROSION | 1991年 / 47卷 / 06期

关键词：

ARTIFICIAL SEAWATER; COATING DISBONDMENT; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; ELECTROCHEMICAL METHODS; EPOXY COATINGS; NONDESTRUCTIVE TESTING;

D O I：

10.5006/1.3585282

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laboratory-prepared samples of four types of epoxy coatings on 1010 (UNS(1) G10100) carbon steel were immersed in aerated ASTM(2) seawater for up to 4 years. Quantitative visual coating degradation via blistering was correlated to coating and corrosion parameters as determined by electrochemical impedance spectroscopy (EIS) modeling and measurements. The data indicate EIS parameters allow identification of subfilm disbondment long before surface evidence of coating deterioration is apparent. An equivalent circuit model suggests disbondment areas as small as 0.0001 percent can be measured.

引用

页码：480 / 489

页数：10

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