Studies of electrochemical corrosion of low alloy steel under epoxy coating exposed to natural seawater using the WBE and EIS techniques

被引：52
作者：
Liu, Jie [1 ]
Zhang, Lunwu [2 ]
Mu, Xianliang [2 ]
Zhang, Peiqing [1 ]
机构：
[1] Yantai Univ, Coll Chem & Chem Engn, Yantai 264005, Peoples R China
[2] Southwest Technol & Engn Res Inst, Chongqing 400039, Peoples R China
来源：
PROGRESS IN ORGANIC COATINGS | 2017年 / 111卷
关键词：
Wire beam electrode; Electrochemical impedance spectroscopy; Low alloy steel; Epoxy coating; Potential distribution; Current distribution; WATER TRANSPORT BEHAVIORS; SCANNING KELVIN PROBE; ORGANIC COATINGS; IMPEDANCE MODELS; LOCALIZED CORROSION; COATED STEEL; ALUMINUM; NOISE; INHOMOGENEITY; DEGRADATION;
D O I：
10.1016/j.porgcoat.2017.06.012
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The electrochemical corrosion of 907A low alloy steel under epoxy coating exposed to natural seawater was investigated by the wire beam electrode (WBE) and electrochemical impedance spectroscopy (EIS) techniques, and the correlations of the current distribution and the EIS characteristics for local defect areas of the coating were discussed. It was found that there were close corresponding relationships among the potential distribution, the current distribution and the EIS characteristics in the whole or local areas of the WBE. Each electrode of the WBE had a distinctive electrochemical corrosion characteristic during the coating degradation process. The EIS characteristics of the WBE were dominated by the substrate corrosion process of the most serious coating defect. Polarity reversals of the single electrodes under epoxy coating can be found, but the causes of the phenomena were different from each other.
引用
收藏
页码：315 / 321
页数：7
相关论文
共 40 条
[1]   NOISE-ANALYSIS APPLIED TO ELECTROCHEMICAL SYSTEMS [J].
BERTOCCI, U ;
HUET, F .
CORROSION, 1995, 51 (02) :131-144
[2]   EIS studies of coated metals in accelerated exposure [J].
Bierwagen, G ;
Tallman, D ;
Li, JP ;
He, LY ;
Jeffcoate, C .
PROGRESS IN ORGANIC COATINGS, 2003, 46 (02) :148-157
[3]   UV-cured polymer-boehmite nanocomposite as protective coating for wood elements [J].
Corcione, C. Esposito ;
Frigione, M. .
PROGRESS IN ORGANIC COATINGS, 2012, 74 (04) :781-787
[4]   Investigating cracks and crazes on coated steel with simultaneous SVET and EIS [J].
de Vooys, Arnoud ;
van der Weijde, Hans .
PROGRESS IN ORGANIC COATINGS, 2011, 71 (03) :250-255
[5]   The assessment of a smart anticorrosive coating by the electrochemical noise technique [J].
Deya, M. C. ;
del Amo, B. ;
Spinelli, E. ;
Romagnoli, R. .
PROGRESS IN ORGANIC COATINGS, 2013, 76 (04) :525-532
[6]   Micro-cells beneath organic lacquers: a study using scanning Kelvin probe and scanning acoustic microscopy [J].
Doherty, M ;
Sykes, JM .
CORROSION SCIENCE, 2004, 46 (05) :1265-1289
[7]   Localized EIS characterization of corrosion of steel at coating defect under cathodic protection [J].
Dong, C. F. ;
Fu, A. Q. ;
Li, X. G. ;
Cheng, Y. F. .
ELECTROCHIMICA ACTA, 2008, 54 (02) :628-633
[8]   Determination of water uptake and diffusion of Cl- ion in epoxy primer on aluminum alloys in NaCl solution by electrochemical impedance spectroscopy [J].
Hu, JM ;
Zhang, JQ ;
Cao, CN .
PROGRESS IN ORGANIC COATINGS, 2003, 46 (04) :273-279
[9]   THE USE OF THE SCANNING VIBRATING ELECTRODE TECHNIQUE FOR DETECTING DEFECTS IN ION VAPOR-DEPOSITED ALUMINUM ON STEEL [J].
ISAACS, HS .
CORROSION, 1987, 43 (10) :594-598
[10]   Cathodic delamination of polyurethane/multiwalled carbon nanotube composite coatings from steel substrates [J].
Khun, N. W. ;
Frankel, G. S. .
PROGRESS IN ORGANIC COATINGS, 2016, 99 :55-60
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