Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution

doi:10.3390/coatings13050944

IMR OpenIR

	Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution
	Udowo, Victor Malachy 1,2; Yan, Maocheng 1; Liu, Fuchun 1,3; Han, En-Hou 1,3
通讯作者	Yan, Maocheng(yanmc@imr.ac.cn) ; Liu, Fuchun(fliu@imr.ac.cn)
	2023-05-17
发表期刊	COATINGS
卷号	13 期号:5 页码:19
摘要	Conjugated poly(3,4-ethylenedioxythiophene) (PEDOT) film was electrochemically synthesized on stainless steel (SS). Redox interactions between the PEDOT film and the SS substrate were examined in 3.5 wt.% NaCl aqueous solution with the aid of electrochemical and spectroscopic analyses. The results show that the PEDOT film exhibited a barrier effect and mediated the oxygen reduction reaction, thus hindering ion diffusion to the steel substrate. Localized electrochemical impedance spectroscopy (LEIS) of the scratched area on the polymer film shows that PEDOT healed the defect by coupling with redox reactions on the steel surface to prevent charge localization and concentration. The electroactivity of the polymer film declined when PEDOT was polarized at potentials >-0.7 V. Prolonged exposure of the PEDOT film to dissolved oxygen in NaCl solution resulted in the polymer's over-oxidation (degradation), evidenced by the formation of a carbonyl group in the spectroscopic result. The degradation of PEDOT was attributed to chain scissoring due to hydroxide ion attacks on the polymer chain.
关键词	conducting polymer coating stainless steel electrochemical interaction degradation
资助者	National Natural Science Foundation of China
DOI	10.3390/coatings13050944
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52071320]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:000997010300001
出版者	MDPI
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178046
专题	中国科学院金属研究所
通讯作者	Yan, Maocheng; Liu, Fuchun
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China
推荐引用方式 GB/T 7714	Udowo, Victor Malachy,Yan, Maocheng,Liu, Fuchun,et al. Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution[J]. COATINGS,2023,13(5):19.
APA	Udowo, Victor Malachy,Yan, Maocheng,Liu, Fuchun,&Han, En-Hou.(2023).Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution.COATINGS,13(5),19.
MLA	Udowo, Victor Malachy,et al."Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution".COATINGS 13.5(2023):19.