Yazar "El Bakri, Youness" seçeneğine göre listele

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    A triazolopyrimidine derivative as corrosion inhibitor for mild steel in HCl solution
    (American Institute of Physics Inc., 2020) Guo, Lei; Yu, Rongrong; Zhao, Jinling; Kaya, Savaş; Tan, Jianhong; El Bakri, Youness
    The inhibition effect of a triazolopyrimidine derivative, i.e., 6-hydroxy-5-phenyl-5,6-dihydro-[1,2,4]tria zolo[4,3-a]pyrimidin-7(8H)-one (HPDTP), against the corrosion of mild steel in 1 M HCl solution was investigated by electrochemical test. We find that the inhibition efficiency increases with inhibitor concentration and it attains an efficiency of more than 90% at 10-3 M. Polarization curves show that HPDTP is a mix-type inhibitor. Changes in impedance parameters were indicative of adsorption of HPDTP on the steel surface, leading to the formation of a protective film. Our findings will contribute to the development and application of novel corrosion inhibitors. © 2020 Author(s).
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    Multidimensional insights involving electrochemical and in silico investigation into the corrosion inhibition of newly synthesized pyrazolotriazole derivatives on carbon steel in a HCl solution
    (Royal Soc Chemistry, 2019) Guo, Lei; El Bakri, Youness; Anouar, El Hassane; Tan, Jianhong; Kaya, Savas; Essassi, El Mokhtar
    Herein, the anti-corrosion of carbon steel in 1 M HCl by two newly synthesized pyrazolotriazole derivatives, namely, 6-methyl-1H-pyrazolo[5,1-c][1,2,4]triazole-7-carbonitrile (CPT) and 1-acetyl-6-methyl-1H-pyrazolo[5,1-c][1,2,4]triazole-7-carbothioamide (MPT), was studied using electrochemical, density functional theory (DFT), and molecular dynamics (MD) simulation techniques. The experimental results showed that the concentrations of inhibitors had a significant influence on their inhibition efficiencies. Potentiodynamic polarization curves indicated that the two pyrazolotriazoles were mixed-type inhibitors. DFT calculations were employed to explore the molecular activity, and MD simulations were performed to obtain the interaction energy between the inhibitor molecules and the iron surface. The findings obtained using the theoretical calculation techniques were consistent with those obtained via experiments.
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    Triblock Copolymer Pluronic F68 as a Corrosion Inhibitor for Aluminum-air Battery: An Electrochemical and in Silico Study
    (Esg, 2019) Guo, Lei; Tan, Jianhong; Yang, Hong; El Bakri, Youness; Kaya, Savas; Leng, Senlin; Yang, Yingchang
    In Al-air batteries, the self-corrosion of aluminum electrodes is an issue worthy of concern. In this paper, the inhibition performance and anti-corrosion mechanism of a triblock copolymer, namely, Pluronic F68, on Al in 3.5% NaCl electrolyte are investigated with a multidimension approach combining electrochemical and theoretical approaches. The results suggest that Pluronic F68 inhibitor can present wonderful anticorrosion efficiency, and the maximum inhibition efficiency can reach 94% at low dose concentration. Meanwhile, the battery containing Pluronic F68 exhibits better performance. Significantly, the present work is beneficial to understand the inhibition mechanism of similar organic polymers and provides a feasible approach to develop Al-air batteries.