Determination of Optimum Concentration of Benzimidazole Improving the Cathodic Disbonding Resistance of Epoxy Coating

被引：5

作者：

Nabavian, Saghar ^{[1
]}

Naderi, Reza ^{[2
]}

Asadi, Najmeh ^{[2
]}

机构：

[1] Islamic Azad Univ, Coll Marine Chem, Dept Marine Sci & Technol, POB 14515-755, Tehran, Iran

[2] Univ Tehran, Coll Engn, Sch Met & Mat Engn, POB 11155-4563, Tehran, Iran

来源：

COATINGS | 2018年 / 8卷 / 12期

关键词：

epoxy coating; EIS; organic inhibitor; benzimidazole; cathodic disbanding; ZINC ALUMINUM POLYPHOSPHATE; ACTIVE CORROSION PROTECTION; SOL-GEL COATINGS; ELECTROCHEMICAL IMPEDANCE; ADHESION PROPERTIES; COATED STEEL; PERFORMANCE; ANTICORROSION; INHIBITOR; DELAMINATION;

D O I：

10.3390/coatings8120471

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study is aimed to evaluate the effect of concentrated benzimidazole (BIM) on the cathodic disbonding (CP) of an epoxy coating applied on steel substrate. For this purpose, the polymeric coatings, formulated with different concentrations of BIM (0 wt.%, 0.5 wt.%, 0.75 wt.%, and 1 wt.%, were subjected to the CP test at the potential of -1.2 V vs. Ag/AgCl during 24 h immersion in 3.5 wt.% NaCl solutions. The optimum formulation was found through taking advantage of the CP test results, FESEM/EDX, and EIS data. Moreover, a pull-off test was used to measure the wet adhesion strength. For insight into the inhibition function of the organic inhibitor, the behavior of steel in the sodium chloride solutions, with and without BIM, was compared using EIS and surface analysis.

引用

页数：11

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