성균관대학교 · 재료과학
N.M. 엘바시وني 교수의 연구실은 주로 철 및 스틸 금속의 부식 방지에 초점을 맞춘 유기 및 계면활성제 기반 억제제 개발을 핵심 연구 분야로 삼고 있습니다. 특히 아질화물(스피르) 유도체, 지질형 양이온 및 제로이온 표면활성제를 활용해 금속 표면에 강력하게 흡착되는 보호막을 형성하는 메커니즘을 규명하고 있으며, 전기화학적·중량 손실 분석을 통해 부식 억제 효율을 정량화합니다. 다양한 환경 조건(산성 용액, 고염수, 미생물 존재 조건 등)에서의 안정성과 효능을 동시에 평가하는 다각적 접근이 특징입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this work, we report the synthesis of two Schiff bases of substituted gallic acid derivatives <i>via</i> amidation reaction and their characterization using <sup>1</sup>H-NMR spectroscopy to study their inhibition performance on the aggressive attack of HCl on mild steel (MS). The inhibitive performance was examined using chemical (weight loss) and electrochemical (Tafel and EIS) test methods. The results indicate that these derivatives significantly suppress the dissolution rate of mild stee
Two ethoxylated nonionic surfactants (L400 and L600) based on Schiff base are prepared from polyoxyethylene, glyoxalic acid, and phenylenediamine. They are evaluated electrochemically as carbon steel corrosion inhibitors in 1 M HCl by electrochemical impedance spectroscopy (EIS) and Tafel techniques and complemented with microscopic analysis methods. The obtained Tafel data indicate the mixed-type behavior of the inhibitor used. The inhibition efficiency touches the peak at 1 × 10<sup>-4</sup> M
A newly anionic surfactant; namely (2Z,2′Z)-4,4′-(ethane-1,2-diylbis((2-((4-dodecylphenyl)sulfonamido)ethyl)azanedinyl)bis(4-oxobut-2enoate), desined as Tetra-anionic surfactant was synthesized. Its chemical structure was confirmed by FTIR and 1HNMR spectroscopic techniques. The corrosion mitigation behavior of the prepared surfactant for mild steel (MS) in high saline synthetic water was monitoring by chemical technique (weight loss), electrochemical techniques (Tafel and EIS). The obtained res
The inhibitory impact of the two synthesized pyrazole derivatives (<b>3</b> and <b>4</b>) toward metallic and microbial corrosion was investigated. Using open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy, it was possible to determine their ability to prevent the corrosion of C-steel in 1 M HCl, which was significantly enhanced with increasing concentration (ex. 93%). They act as mixed-type inhibitors, according to polarization curves. The compounds
Abstract Designating an organic inhibitor with a specific chemical structure that actively participates in steel protection by increasing adsorption on the steel surface. Based on that, we synthesized three zwitterionic surfactants based on azomethine with different hydrophobic chain lengths labeled ZWSO, ZWSD, and ZWSH. The presence of azomethine group, electrons, and heteroatoms in the zwitterionic surfactant’s amphipathic structure helped to improve C-steel protection. Their inhibitory activi
Abstract Bis ethoxylated cationic surfactant (BOECS) is synthesized. The prepared surfactant’s structure configuration was verified through a variety of spectral and physicochemical techniques, including FT-IR, MS, 1 HNMR, and surface activity evaluations. BOECS applications as a C-steel corrosion inhibitor in 1.0 N HCl and 1.0 N H 2 SO 4 and sulfate reducing bacteria (SRB) mitigations have been investigated thoroughly. Physical properties of the BOECS indicate its potential adsorption affinity
Effective corrosion inhibitors are essential for preventing metal degradation. In this study, a novel polyoxyethylene-based cationic surfactant (ECS) was synthesized and its structure was confirmed using various spectroscopic techniques, including FTIR and ¹H NMR. The ECS exhibits both surface-active and antibacterial properties due to the presence of quaternary ammonium, polyoxyethylene, and alkyl chain moieties, which facilitate its adsorption onto bacterial membranes and carbon steel (C-steel
