New Eco-Friendly Surfactant Corrosion Inhibitors Derived from Polyethylene Glycol: Surface Activity, Gravimetric, Electrochemical, Theoretical Quantum Computation, and Simulation Analysis | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 68, Issue 2, February 2025, Page 401-419 PDF (1.22 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2024.274647.9412 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Madiha Mohamed Hegazy1; Eid Metwaly khalil1; Mahmoud Abdelaziz Farag Mansour   2; Emad Abdel Atty badr3
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| 1Chemistry department,Faculty of science,Helwan University | ||||
| 2Corrosion Resistance Department, General Petroleum Company, Red sea,Ras gharib | ||||
| 3Surfactant Laboratory, Petrochemical Department; Egyptian Petroleum Research Institute (EPRI); | ||||
| Abstract | ||||
| Corrosion inhibitors are vital for infrastructure preservation from corrosion, cost savings, and environmental protection. Recognizing ecological consequences underscores the need for eco-friendly inhibitor development and proactive management to safeguard resources and ecosystems. In this study, Development of eco-friendly Gemini surfactants based on PEG derivatives, systematically varying PEG molecular weight, characterized by FTIR and 1H NMR, with detailed corrosion inhibition evaluation and computational studies. PEG derivative surfactants were synthesized from different molecular weights (400, 1000, 4000, 6000) of PEG via oxidation with chromic acid. The resulting PEG carboxylic acid intermediates were then amidated with N, N-Dimethylpropane-1,3-diamine and converted into cationic Gemini surfactant bromide compounds using 1-Bromooctane. In 1 N HCl, surface activity was measured at 25°C, 40°C, and 60°C, showing that as temperature increases, surface tension decreases, and CMC values rise for all synthesized surfactants. PE-Br-6000 exhibited higher corrosion inhibition efficacy (%ηw) at 400 ppm (95.5%, 97.5%, 98.0%) compared to PE-Br-4000 (92.6%, 94.9%, 95.1%), PE-Br-1000 (90.0%, 92.0%, 93.2%), and PE-Br-400 (87.4%, 87.6%, 90.8%) at 25°C, 55°C, and 70°C. Potentiodynamic polarization showed PE-Br-6000's efficacy at 25°C was 89.3%, surpassing PE-Br-4000 (85.9%), PE-Br-1000 (85.2%), and PE-Br-400 (84.8%). Electrochemical impedance spectroscopy indicated PE-Br-6000's 95.6% efficacy at 25°C, outperforming PE-Br-4000 (95.3%), PE-Br-1000 (95.2%), and PE-Br-400 (95.0%). Quantum computational studies used Gaussian 09W (RHF theory, Sto-3G basis sets) and Monte Carlo (MC) Simulation with Biovia Material Studio software (2020). Further PEG derivative research involves exploring wider molecular weight ranges and structural modifications. Enhanced synthesis, extended corrosion testing, computational modeling, and environmental assessments aim to optimize eco-friendly corrosion inhibitors for improved infrastructure protection. | ||||
| Keywords | ||||
| PEG derivatives surfactants; eco-friendly; Gemini surfactant; corrosion inhibitors; surface activity; and computational analysis | ||||
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