A passivation mechanism of doped polyaniline on 410 stainless steel in deaerated H2SO4 solution

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	A passivation mechanism of doped polyaniline on 410 stainless steel in deaerated H2SO4 solution
	L. Zhong ; H. Zhu ; J. Hu ; S. H. Xiao ; F. X. Gan
刊名	Electrochimica Acta
	2006
卷号	51 期号:25 页码:5494-5501
关键词	doped polyaniline stainless steel galvanic coupling passivation mechanism corrosion protection mild-steel conducting polymers stainless-steel coatings films anticorrosion performance inhibition behavior
ISSN号	0013-4686
中文摘要	To investigate the role of polyaniline (PANI) in the corrosion protection of stainless steel (SS) in oxygen-deficient acidic solution, a separate doped PANI film electrode on a glass substrate was prepared and the test solution (1 M H2SO4) was purged with high-purity N-2 until dissolved oxygen level decreased more than two orders of magnitude. In this deaerated 1 M H2SO4 solution, the galvanic coupling interaction between the separate PANI film electrode and 410 SS was studied. Results reveal that the separate PANI film can passivate the 410 SS steadily for a long period of time. A variety of experimental methods including potentiodynamic measurement, potentiostatic (current-time) examination and X-ray photoelectron spectroscopy (XPS) are used to explore the mechanism by which the separate PANI film passivated the galvanic coupling SS in the deaerated sulfuric solution. These studies show that passivation is achieved because PANI film provides a large critical current at the early stage of coupling and a persistent passive current by its electrochemical dedoping/re-doping equilibrium activity with the acidic environment at the subsequent stage of coupling. (c) 2006 Elsevier Ltd. All riuhts reserved.
原文出处	://WOS:000240026500033
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34763]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Zhong,H. Zhu,J. Hu,et al. A passivation mechanism of doped polyaniline on 410 stainless steel in deaerated H2SO4 solution[J]. Electrochimica Acta,2006,51(25):5494-5501.
APA	L. Zhong,H. Zhu,J. Hu,S. H. Xiao,&F. X. Gan.(2006).A passivation mechanism of doped polyaniline on 410 stainless steel in deaerated H2SO4 solution.Electrochimica Acta,51(25),5494-5501.
MLA	L. Zhong,et al."A passivation mechanism of doped polyaniline on 410 stainless steel in deaerated H2SO4 solution".Electrochimica Acta 51.25(2006):5494-5501.