| Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy | |
| Gao Bowen1,2; Wang Meihan1; Yan Maocheng2; Zhao Hongtao2; Wei Yinghua2; Lei Hao2 | |
| Corresponding Author | Wang Meihan(wangmhdicp@aliyun.com) ; Yan Maocheng(yanmc@imr.ac.cn) |
| 2020-11-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 56Issue:11Pages:1541-1550 |
| Abstract | 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. |
| Keyword | PEDOT coating 2024 aluminum alloy electrodeposition EIS SVET |
| Funding Organization | 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 |
| DOI | 10.11900/0412.1961.2020.00089 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000584345200010 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141458 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang Meihan; Yan Maocheng |
| Affiliation | 1.Shenyang Univ, Sch Mech Engn, Shenyang 110044, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation 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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment