Experimental and theoretical insights into synthesized Gemini corrosion inhibitor for X65-steel in 1M HCl | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 65, Issue 132, December 2022, Page 845-867 PDF (2.38 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2022.152233.6594 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Ahmed Nasser Abdu  1; nasser mohamed elbasiony2; M. A. Migahed3; hassan abd elbary4; tarek Abdallah mohamed 4
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| 1Department of basic science, High Institute for Engineering and Modern Technology, New-Elmarg, El-Qalyubia, Egypt | ||||
| 2Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, Egypt | ||||
| 31 Ahmed El-Zomor Elzohour Region | ||||
| 4Department of Chemistry, Faculty of Science (Men’s Campus), Al-Azhar University, Nasr City 11884, Cairo | ||||
| Abstract | ||||
| Three Gemini cationic surfactants (GI-surfactants) of different hydrophobic chain lengths based on di-imine compound, abbreviated as GI-6, GI-12 and GI-14, were synthesized and characterized using FT-IR and 1HNMR. The surface-active parameters calculated in acidic media were discussed. The inhibition performance of GI-surfactants for X65-steel corrosion was assessed by weight loss and electrochemical techniques in 1M HCl and was accompanied by surface analysis and theoretical studies. The resistance of X65-steel was enhanced to nearly ⁓764 ohm.cm2 after adding 1x10-3 M of GI-14. This inferred a protective film formation on the X65-steel surface via adsorption phenomena that followed the Langmuir isotherm. The GI-surfactants’ inhibition efficiency exceeded 95% at room temperature and 93 % at 328 K owing to the electron-rich centers’ presence in their chemical structures. The relation between the prepared GI-surfactants molecular structures and their corrosion inhibition performance was studied theoretically based on DFT and MCs methods. The safeguard effect of GI-surfactants was confirmed by SEM and EDX. The comparison study between the GI-surfactants’ performance and the previously reported compounds confirmed their high potential applications as corrosion inhibitors. | ||||
| Keywords | ||||
| X65-steel; Corrosion; Gemini surfactant; CMC; EIS; DFT | ||||
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