Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy

doi:10.11900/0412.1961.2020.00089

CORC > 金属研究所 > 中国科学院金属研究所

	Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy
	Gao Bowen 1,2; Wang Meihan 1; Yan Maocheng 2; Zhao Hongtao 2; Wei Yinghua 2; Lei Hao 2
刊名	ACTA METALLURGICA SINICA
	2020-11-11
卷号	56 期号:11 页码:1541-1550
关键词	PEDOT coating 2024 aluminum alloy electrodeposition EIS SVET
ISSN号	0412-1961
DOI	10.11900/0412.1961.2020.00089
通讯作者	Wang Meihan(wangmhdicp@aliyun.com) ; Yan Maocheng(yanmc@imr.ac.cn)
英文摘要	Poly (3,4-ethylenedioxythiophene) (PEDOT) is one of the most promising anticorrosive materials due to its outstanding conductivity, stability, and environmental compatibility. From the standpoint of corrosion protection of aluminum alloys, PEDOT coatings are a good substitute for the traditional toxic chromium-based coatings. Electrochemical deposition, as a convenient and clean synthesis approach, has been widely employed for direct preparation of PEDOT coatings. Herein, cyclic voltammetry and constant-current method were used to electrodeposit PEDOT coatings on 2024 aluminum alloy substrates. The effects of polymerizing 3,4-ethylenedioxythiophene (EDOT) in three electrolyte solutions (lithium perchlorate (LiClO4) and sodium dodecyl sulfate (SDS), sodium hydrogen phthalate (C8H5NaO4) and SDS, and tetrabutylammonium hexafluorophosphate (TBAPF(6)) acetonitrile) on the growth and morphology of the PEDOT coatings were investigated. The interactions between the coating and the aluminum substrate were studied through galvanic corrosion, electrochemical impedance spectra (EIS), and scanning vibration electrode technology (SVET). The results show that TBAPF, exhibited passivation and corrosion-inhibition effects on the substrate and significantly reduced the oxidation potential of EDOT. The surface morphology of the coating prepared via constant-current method showed complete and dense agglomerated spherical particles. The PEDOT coating formed a passivation layer on the substrate, and thus protected it from the corrosive medium. The maximum resistance was achieved in DHS solution (3.5 g/L (NH4)(2)SO2+0.5 g/L NaCl) after 3 d. The scratched PEDOT coating could promote surface charge delocalization and avoid charge concentration, resulting in electrochemical protection of the aluminum alloy.
资助项目	National Natural Science Foundation of China[52071320] ; National Basic Research Program of China[2014CB643304] ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program for Innovation Talents in Univerisity of Liaoning Province
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000584345200010
资助机构	National Natural Science Foundation of China ; National Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program for Innovation Talents in Univerisity of Liaoning Province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/141454]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang Meihan; Yan Maocheng
作者单位	1.Shenyang Univ, Sch Mech Engn, Shenyang 110044, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gao Bowen,Wang Meihan,Yan Maocheng,et al. Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy[J]. ACTA METALLURGICA SINICA,2020,56(11):1541-1550.
APA	Gao Bowen,Wang Meihan,Yan Maocheng,Zhao Hongtao,Wei Yinghua,&Lei Hao.(2020).Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy.ACTA METALLURGICA SINICA,56(11),1541-1550.
MLA	Gao Bowen,et al."Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy".ACTA METALLURGICA SINICA 56.11(2020):1541-1550.