The role of oxide layer formation during corrosion inhibition of mild steel in neutral aqueous media

被引：51
|
作者：
Karman, FH
Felhosi, I
Kalman, E
Cserny, I
Kover, L
机构：
[1] Hungarian Acad Sci, Cent Res Inst Chem, H-1525 Budapest, Hungary
[2] Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary
来源：
ELECTROCHIMICA ACTA | 1998年 / 43卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
inhibition; adsorption; phosphonic acid; calcium ion; XPS; XAES; EIS;
D O I：
10.1016/S0013-4686(97)00236-3
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The influence of phosphonic acid with Ca cation on iron surfaces in neutral aerated media (0.5 mol dm(-3) NaClO4) has been studied by electrochemical and surface analytical methods. X-ray induced photoelectron (XPS) and Auger electron spectroscopy (XAES) provided the possibility for identification of different chemical states of the constituents of the corrosion protective layers. The presence of certain cations led to a synergistic effect. It was found that calcium ions were incorporated into the film that developed on the mild steel surface, containing a mixed oxide and hydroxide complex. Electrochemical Impedance Spectroscopy (EIS) was used to determine the inhibitor efficiency of phosphonic acid at different concentrations. The data obtained were fitted and modelled by an equivalent circuit model. (C) 1997 Elsevier Science Ltd.
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收藏
页码：69 / 75
页数：7
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