1. Prolonged corrosion protection via application of 4-ferrocenylbutyl saturated carboxylate ester derivatives with superior inhibition performance for mild steel.
- Author
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Jamali, Hajar, Moradi-Alavian, Saleh, Asghari, Elnaz, Esrafili, Mehdi D., Payami, Elmira, and Teimuri-Mofrad, Reza
- Subjects
MILD steel ,CARBOXYLATE derivatives ,ESTER derivatives ,CARBOXYLIC acids ,ATOMIC force microscopy ,CARBOXYLATES ,DENSITY functional theory ,EPOXY coatings - Abstract
A series of 4-ferrcenylbutyl carboxylate esters with different alkyl chain length (C
2 -C4 ) of carboxylic acids were synthesized using Fe3 O4 @SiO2 @(CH2 )3 -Im-bisEthylFc[I] nanoparticles as catalyst and have been characterized with FT-IR,1 H NMR, and13 C NMR. Ferrocenyl-based esters were used as corrosion inhibitors of mild steel in the 1M HCl solution as corrosive media. The corrosion inhibition efficiency of the synthesized ferrocenyl-based esters has been assessed by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The 4-ferrocenylbutyl propionate showed a more effective corrosion inhibition behavior among the studied esters with 96% efficiency after immersion in the corrosive media for 2 weeks. The corrosion inhibition mechanism is dominated by formation of passive layer of inhibitor on the surface of the mild steel by adsorption. Moreover, the adsorption characteristics of 4-butylferrcenyl carboxylate esters on mild steel were thoroughly explored using density functional theory calculations. It was found that the Fe atoms located around the C impurity in the mild steel are the most efficient and active sites to adsorb 4-butylferrcenyl carboxylate esters. [ABSTRACT FROM AUTHOR]- Published
- 2024
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