Debonding Mechanism of Organic Coating with Man-made Defect in the Area nearby Water-line by WBE Technique

doi:10.11902/1005.4537.2015.025

Journal of Chinese Society for Corrosion and protection

2016, Vol. 36

Issue (1): 67-72 DOI: 10.11902/1005.4537.2015.025

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Debonding Mechanism of Organic Coating with Man-made Defect in the Area nearby Water-line by WBE Technique

Yalin CHEN^1,²,Wei ZHANG^1,²,Kuiying DING³,Jia WANG^4,⁵(

),Pengfei YIN^1,²,Caichang DONG^1,²,Wanguo YANG^1,²

1. Qingdao Institute of Marine Corrosion, Central Iron & Steel Research Institute, Qingdao 266071, China
2. NCS Testing Technology Co., Ltd., Qingdao 266071, China
3. Technical Center of Weifang Entry-Exit Inspection and Quarantine Bureau, Weifang 261041, China
4. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
5.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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Abstract

The debonding process of organic coatings with desired artificial defects in 3.5%NaCl solution was studied by means of wire beam electrode (WBE) method and electrochemical impedance spectroscopy (EIS) technique. The purpose was to reveal the relevant debonding mechanism of organic coatings in the area nearby water-line via analyzing the current distribution and the variation of impedance spectroscopy during the experiment. It was found that, either the artificial defect or inherent defect could accelerate cathodic debonding rate of the coating around the defects. Besides, due to the effect of waterline, a coating debonding, which initiated from one inherent defect will expand towards the waterline. The coating debonding occurred firstly on the area below the waterline, and then later above the waterline. The coating debonding rate on the area above waterline was controlled by the permeation rate of electrolyte through the coating.

Key words: wire beam electrode water-line area coating stripping current distribution electrochemical impedance spectroscopy

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	Yalin CHEN
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	Kuiying DING
	Jia WANG
	Pengfei YIN
	Caichang DONG
	Wanguo YANG

Cite this article:

Yalin CHEN,Wei ZHANG,Kuiying DING,Jia WANG,Pengfei YIN,Caichang DONG,Wanguo YANG. Debonding Mechanism of Organic Coating with Man-made Defect in the Area nearby Water-line by WBE Technique. Journal of Chinese Society for Corrosion and protection, 2016, 36(1): 67-72.

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https://www.jcscp.org/EN/10.11902/1005.4537.2015.025 OR https://www.jcscp.org/EN/Y2016/V36/I1/67

Fig.1 Photo of WBE surface

Fig.2 Distribution maps of current density of the WBE surface after immersion for 3 d (a), 6 d (b), 19 d (c), 35 d (d), 67 d (e) and 85 d (f)

Fig.3 Photos of the WBE surface after immersion for 6 d (a), 35 d (b), 64 d (c) and 73 d (d)

Fig.4 Bode plots of 7-6# wire and 10-7# wire (a), Nyquist plot of 7-6# wire and fitting result (b), equivalent circuit of 7-6# wire (c)

Fig.5 Bode plots of 10-7# and 7-4# wires after immersion for 35 d

Fig.6 Nyquist plot (a) and Bode plot (b) of 10-7# wire after immersion for 67 d

Fig.7 Change of the anode current density of the whole electrode during the immersion process

[1]	Evans U R.Report on corrosion research work at Cambridge University interrupted by the outbreak of war[J]. J. Iron Steel Inst.,1940, 141: 219
[2]	Evans U R.Translated by Hua B D. The Corrosion and Oxidation of Metals [M]. Beijing: China Machine Press, 1976: 70
[2]	(Erans U R著. 华宝定译. 金属腐蚀与氧化 [M]. 北京: 机械工业出版社, 1976: 70)
[3]	Tomashov N D.The Theory of Corrosion and Protection of Metals[M]. New York: MacMillan, 1966: 469
[4]	Jeffrey R, Melchers R E.Corrosion of vertical mild steel strips in seawater[J]. Corros. Sci., 2009, 51(10): 2291
[5]	Tan Y, Bailey S, Kinsella B.Mapping non-uniform corrosion using the wire beam electrode method. III. Water-line corrosion[J]. Corros. Sci., 2001, 43(10): 1931
[6]	Chen Y L, Zhang W, Wang J, et al.Evaluation of metal corrosion in the water-line area by WBE technique[J]. J. Chin. Soc. Corros. Prot., 2014, 34(5): 451
[6]	(陈亚林, 张伟, 王佳等. WBE技术研究水线区金属腐蚀[J]. 中国腐蚀与防护学报, 2014, 34(5): 451)
[7]	Zhang W, Wang J, Li Y N, et al.Evaluation of metal corrosion under defective coatings by WBE and EIS technique[J]. Acta Phys.-Chim. Sin., 2010, 26(11): 2941
[7]	(张伟, 王佳, 李玉楠等. WBE联合EIS技术研究缺陷涂层下金属腐蚀[J]. 物理化学学报, 2010, 26(11): 2941)
[8]	Wang W, Zhang X, Wang J.The influence of local glucose oxidase activity on the potentialrrent distribution on mild steel: A study by the wire beam electrode method[J]. Electrochim. Acta, 2009, 54: 5598
[9]	Zhang X, Wang J, Wang W.A novel device for the wire beam electrode method and its application in the ennoblement study[J]. Corros. Sci., 2009, 51(6): 1475
[10]	Kong D, Wang Y, Zhang W, et al.Correlation between electrochemical impedance and current distribution of carbon steel under organic coating[J]. Mater. Corros., 2012, 63: 475
[11]	Li Y N.The research of the cathodic protection effect on broken organic coating [D]. Qingdao: Ocean University of China, 2011
[11]	(李玉楠. 阴极保护对破损有机涂层防护作用的研究 [D]. 青岛: 中国海洋大学, 2011)
[12]	Wang D.Study on eeffct of inhibitors on loealized corrosion of metal using the wire-beam electrode [D]. Changsha: Hunan University, 2005
[12]	(王丹. 用丝束电极研究缓蚀剂对金属局部腐蚀的影响 [D]. 长沙: 湖南大学, 2005)
[13]	Wang F P, Kang W L, Jing H M. Corrosion Electrochemical Principle, Method and Application [M]. Beijing: Chemical Industry Press, 2008: 132
[13]	(王凤平, 康万利, 敬和民. 腐蚀电化学原理,方法及应用 [M]. 北京: 化学工业出版社, 2008: 132)
[14]	Cao C N.Corrosion Electrochemical Principle [M]. 3rd Ed., Beijing: Chemical Industry Press, 2008: 229
[14]	(曹楚南. 腐蚀电化学原理 [M]. 第三版. 北京: 化学工业出版社, 2008: 229)
[15]	Zhang B H, Cong W B, Yang P.Metal Electrochemical Corrosion and Protection [M]. Beijing: Chemical Industry Press, 2005: 115
[15]	(张宝宏, 丛文博, 杨萍. 金属电化学腐蚀与防护 [M]. 北京: 化学工业出版社, 2005: 115)

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