The Inhibitive Effect of Carbon Containing Corrosion Products Inside Corrosion Pits on the Repassivation of Carbon Steels

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	The Inhibitive Effect of Carbon Containing Corrosion Products Inside Corrosion Pits on the Repassivation of Carbon Steels
	Xu, Weichen 1; Yu, Fei 2; Yang, Lihui 1; Ma, Xiumin 1; Zheng, Meng 1; Li, Yantao 1; Hou, Baorong 1
刊名	INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
	2016-06-01
卷号	11 期号:6 页码:4323-4336
关键词	pitting corrosion repassivation corrosion products carbon
英文摘要	The effect of carbon containing corrosion products within corrosion pits on the repassivation of pits has been studied on 20# and 45# carbon steels in sodium chloride and sodium hydroxide / nitrate / nitrite solutions. Anodic polarisation tests have been carried out in an attempt to cause pitting corrosion and then measure the repassivation potential. The presence of corrosion products within pits has been demonstrated via EDX. Pits in 0.1 M NaNO2 solutions with different concentrations of NaCl (20 mM, 40 mM, 0.1 M and 0.2 M) have been found to repassivate at different potentials. The repassivation potential of 45# carbon steel is lower than that of 20# when carbon containing corrosion products are detected within corrosion pits, but the difference is negligible when the products are not detected. The presence and absence of carbon containing corrosion products is found to depend on the concentration of chloride. The difference on the repassivation potentials has been ascribed to the inhibitive effect of corrosion products on metal ion diffusion, which may maintain aggressive solution within pits and inhibit repassivation at a low dissolution rate. It has also been found that pits cannot repassivate in NaOH and NaCl solutions, while pitting corrosion cannot take place in NaNO3 and NaCl solutions.
收录类别	SCI
语种	英语
WOS记录号	WOS:000378559300010
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/130972]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Qingdao Univ, Coll Med, Qingdao 266021, Peoples R China
推荐引用方式 GB/T 7714	Xu, Weichen,Yu, Fei,Yang, Lihui,et al. The Inhibitive Effect of Carbon Containing Corrosion Products Inside Corrosion Pits on the Repassivation of Carbon Steels[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2016,11(6):4323-4336.
APA	Xu, Weichen.,Yu, Fei.,Yang, Lihui.,Ma, Xiumin.,Zheng, Meng.,...&Hou, Baorong.(2016).The Inhibitive Effect of Carbon Containing Corrosion Products Inside Corrosion Pits on the Repassivation of Carbon Steels.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,11(6),4323-4336.
MLA	Xu, Weichen,et al."The Inhibitive Effect of Carbon Containing Corrosion Products Inside Corrosion Pits on the Repassivation of Carbon Steels".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 11.6(2016):4323-4336.