Imidazole-Fe Interaction in an Aqueous Chloride Medium: Effect of Cathodic Reduction of the Native Oxide

被引：58

作者：

Bhargava, G. ^{[1
]}

Ramanarayanan, T. A. ^{[1
]}

Bernasek, S. L. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

来源：

LANGMUIR | 2010年 / 26卷 / 01期

基金：

美国国家科学基金会;

关键词：

MILD-STEEL CORROSION; BENZIMIDAZOLE DERIVATIVES; IRON CORROSION; ACIDIC MEDIUM; CARBON-STEEL; INHIBITION; SURFACE; XPS; MECHANISM; COATINGS;

D O I：

10.1021/la9020355

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of the reduction of the native surface oxide of Fe on the binding of imidazole (as a corrosion inhibitor) with Fe in an aqueous brine solution has been addressed here. The surface interactions and corrosion inhibition efficiency were studied using X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). It was shown that imidazole dissolved in brine bonds with the Unreduced iron oxide surface via pyrrole-type nitrogen. However, surface interactions with Fe occur via both pyridine-type and pyrrole-type nitrogen atoms when imidazole is added to brine containing a cathodically reduced iron surface. The packing density of imidazole is found to be higher ill the latter case with a corresponding increase in the corrosion inhibition efficiency.

引用

页码：215 / 219

页数：5

共 33 条

[21] Frequency dispersion of the interfacial impedance at mild steel corrosion in acid media in the presence of benzimidazole derivatives [J].