Effect of Redox Switch, Coupling, and Continuous Polarization on the Anti-Corrosion Properties of PEDOT Film in NaCl Solution
Source abstract
Abstract
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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Conducting polymers and applications · Electrochemical Analysis and Applications · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Institute of Corrosion Science and Technology, Guangzhou 510530, China
Funding
National Natural Science Foundation of China
References (43)
Show source-provided references
1. Conducting polymers: A comprehensive review on recent advances in synthesis, properties and applications10.1039/D0RA07800J ↗
2. Conducting polymers and corrosion: Part 2—Polyaniline on aluminum alloys10.5006/1.3280544 ↗
3. What Drives the Kinetics and Doping Level in the Electrochemical Reactions of PEDOT:PSS?10.1002/adfm.202105821 ↗
4. Redox-active conducting polymers modulate Salmonella biofilm formation by controlling availability of electron acceptors10.1038/s41522-017-0027-0 ↗
5. Galvanic coupling between metal substrate and polyaniline acrylic blends: Corrosion protection mechanism10.1016/j.electacta.2004.10.003 ↗
6. Corrosion Control Coatings for Aluminum Alloys Based on Neutral and n-Doped Conjugated Polymers10.1149/1.3190162 ↗
7. Role of oxygen in the galvanic interaction between polypyrrole and aluminum alloy10.1016/j.electacta.2008.08.008 ↗
8. The catalytic activity of conducting polymers toward oxygen reduction10.1016/j.electacta.2004.10.024 ↗
9. Oxygen-induced doping on reduced PEDOT10.1039/C6TA10521A ↗
10. Characteristics of Poly(3,4-ethylenedioxythiophene) Modified Stainless Steel as Anode in Air-Cathode Microbial Fuel Cells10.1021/acs.iecr.8b00563 ↗
11. Influence of oxygen and carbon dioxide on the electrochemical stability of poly(3,4-ethylenedioxythiophene) used as ion-to-electron transducer in all-solid-state ion-selective electrodes10.1016/S0925-4005(01)00983-2 ↗
12. Preparation and corrosion inhibition of single and biphase composite coating based on PEDOT in 0.1 M NaOH10.20964/2019.05.50 ↗
13. Electrochemical Preparation and Corrosion Resistance of PEDOT Coatings on Surface of 2024 Aluminum Alloy
14. PEDOT: PSS-exfoliated graphene to improve the corrosion resistance of waterborne epoxy coating10.20964/2019.05.37 ↗
15. Electrochemical synthesis of poly(3,4-ethylenedioxythiophene) on stainless steel and its corrosion inhibition performance10.1007/s11998-013-9482-6 ↗
16. Usefulness of aqueous anionic micellar media for electrodeposition of poly-(3,4-ethylenedioxythiophene) films on iron, mild steel and aluminum10.1016/S0013-4686(99)00417-X ↗
17. Some aspects of corrosion and film formation of austenitic stainless steel type 316LN using electrochemical impedance spectroscopy (EIS)10.1007/s10853-006-0476-y ↗
18. Udowo, V.M., Gao, Q., Yan, M., and Liu, F. (2023). Sulfate-Reducing Bacteria Corrosion of Pipeline Steel in Polyacrylamide Gel Used for Enhanced Oil Recovery. J. Mater. Eng. Perform.10.1007/s11665-023-08058-2 ↗
19. Microbiological corrosion of pipeline steel under yield stress in soil environment, Corros
20. Description of the Faradaic Current in Cyclic Voltammetry of Adsorbed Redox Species on Semiconductor Electrodes10.1021/jacs.2c00782 ↗
21. A Practical Beginner’s Guide to Cyclic Voltammetry10.1021/acs.jchemed.7b00361 ↗
22. A galvanic cell driven controlled release system based on conducting polymers10.1016/j.snb.2007.09.038 ↗
23. Corrosion performance of conducting polymer coatings applied on mild steel10.1016/j.corsci.2004.07.005 ↗
24. Corrosion inhibition performance of polypyrrole Al flake composite coatings for Al alloys10.1016/j.corsci.2012.12.019 ↗
25. Nwokolo, I.K., Shi, H., Ikeuba, A.I., Gao, N., Li, J., Ahmed, S., and Liu, F. (2022). Synthesis, Characterization and Investigation of Anticorrosion Properties of an Innovative Metal–Organic Framework, ZnMOF-BTA, on Carbon Steel in HCl Solution. Coatings, 12.10.3390/coatings12091288 ↗
26. Green corrosion protection for mild steel in acidic media: Saponins and crude extracts of Gongronema latifolium10.1108/PRT-03-2018-0020 ↗
27. Corrosion of conductive polypyrrole: Effects of continuous cathodic and anodic polarisation10.1016/j.corsci.2013.01.006 ↗
28. Insights on the capacitance degradation of polypyrrole nanowires during prolonged cycling10.1016/j.polymdegradstab.2022.110034 ↗
29. One-pot electrosynthesis of ultrathin overoxidized poly(3,4-ethylenedioxythiophene) films10.1016/j.electacta.2021.139472 ↗
30. Structural changes during the overoxidation of electro-chemically deposited poly(3,4-ethylenedioxythiophene) films10.5599/jese.225 ↗
31. X-ray photoelectron and in situ and ex situ resonance Raman spectroscopic investigations of polythiophene overoxidation10.1007/s10008-017-3698-9 ↗
32. Tuning PEDOT:PSS low-impedance thin films with high charge injection for microelectrodes applications10.1016/j.porgcoat.2022.106894 ↗
33. Corrosion behavior of plasma electrolysis layer cross-linked with a conductive polymer coating10.1016/j.jmrt.2021.10.090 ↗
34. Structure and Dopant Engineering in PEDOT Thin Films: Practical Tools for a Dramatic Conductivity Enhancement10.1021/acs.chemmater.6b01035 ↗
35. Degradation phenomena and degradation mechanisms for highly conductive PEDOT: PSS films10.1016/j.matlet.2021.131106 ↗
36. Light induced damage in poly(3,4-ethylenedioxythiophene) and its derivatives studied by photoelectron spectroscopy10.1016/j.synthmet.2003.08.017 ↗
37. Sensors and Actuators B: Chemical Synergetic PEDOT degradation during a reactive ion etching process10.1016/j.snb.2016.02.009 ↗
38. Conducting polymers for corrosion protection: A review10.1007/s11998-014-9586-7 ↗
39. Chloride-induced alterations of the passive film on 316L stainless steel and blocking effect of pre-passivation10.1016/j.electacta.2019.135159 ↗
40. Tahir, M., Din, I.U., Zeb, M., Aziz, F., Wahab, F., Gul, Z., Sarker, M.R., Ali, S., and Ali, S.H.M. (2022). Thin Films Characterization and Study of N749-Black Dye for Photovoltaic Applications. Coatings, 12.10.3390/coatings12081163 ↗
41. Effect of concentration and addition of ions on the adsorption of sodium dodecyl sulfate on stainless steel surface in aqueous solutions10.1016/j.colsurfa.2015.06.057 ↗
42. Polypyrrole/graphene nanosheets/rare earth ions/dodecyl benzene sulfonic acid nanocomposite as a highly effective anticorrosive coating10.1016/j.surfcoat.2016.09.010 ↗
43. Corrosion of conductive polypyrrole: Effects of environmental factors, electrochemical stimulation, and doping anions10.1016/j.corsci.2012.04.013 ↗