Reham M. Ali, Abou-Elhagag A. Hermas, Abobakr M. Elnady, Tharwat H. Mansoure
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引用次数: 0
Abstract
Conducting polymers (CPs), such as poly(3,4-ethylenedioxythiophene) (PEDOT), are widely recognized for their exceptional electrical conductivity, chemical stability, and environmental durability, making them promising candidates for protective coatings on metal surfaces. In this study, PEDOT coatings were electrochemically deposited on mild steel and platinum electrodes using cyclic voltammetry (CV) in a non-aqueous acetonitrile medium containing tetrabutylammonium hexafluorophosphate. The deposition conditions—including scan rate, initial and final potentials, monomer concentration, and temperature—were optimized to achieve a homogeneous, compact, and adhesive polymer layer. The optimal conditions involved an EDOT monomer concentration of 0.01 M, a scan rate of 100 mV/s, and a potential range from − 0.5 to 1.8 V (SCE) at 30 °C. The electropolymerization process was found to be more efficient on steel (activation energy, Ea = 10.894 kJ/mol) than on platinum (Ea = 49.426 kJ/mol), resulting in a denser PEDOT film with lower activation energy. Fourier transform infrared spectroscopy (FTIR) confirmed successful polymerization, while scanning electron microscopy (SEM) revealed distinct morphological differences between PEDOT coatings on steel and platinum surfaces. Corrosion studies in HCl and H₂SO₄ solutions demonstrated that PEDOT-coated steel exhibited substantially enhanced corrosion resistance compared to uncoated steel, achieving a protective efficiency of up to 66% after 24 h of immersion. Electrochemical impedance spectroscopy (EIS) further highlighted the superior barrier properties of PEDOT, emphasizing its ability to prevent corrosion by forming an effective barrier layer and promoting the formation of a passive film beneath the coating.
期刊介绍：
The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry.
The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces.
The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis.
The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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