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    Adsorption study of N (-benzo[d]thiazol-2-yl)-1-(thiophene-2-yl) methanimine at mild steel/aqueous H2SO4 interface
    (Elsevier, 2022) Singh, Ashish Kumar; Singh, Manjeet; Thakur, Sanjeeve; Pani, Balaram; Kaya, Savas; EL Ibrahimi, Brahim; Marzouki, Riadh
    This study reports microwave (MW) assisted synthesis of N (-benzo[d]thiazol-2-yl)-1-(thiophene-2-yl) methanimine (BTTM) in reasonably good yield and purity. The synthesized compound (BTTM) has been characterized by elemental analysis, IR and 1H NMR spectroscopy and examined for its corrosion inhibition activity for mild steel in aqueous H2SO4 medium using gravimetric and different electrochemical methods. The corrosion inhibition study was also performed at different temperatures to understand the effect of temperature on corrosion inhibiting potential of BTTM. The metal protecting ability of BTTM in acid solution was further examined by surface analyses; X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurement. The surface analyses reveal that the BTTM adsorbed on mild steel (MS) surface following ElAwady isotherm. Theoretical studies, viz. molecular orbital analysis and molecular dynamic (MD) modelling were also conducted to understand the inhibition mechanism completely.
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    Advancement of corrosion inhibitor system through N-heterocyclic compounds: a review
    (Taylor & Francis Ltd, 2023) Sheetal, Rashika; Batra, Rashika; Singh, Ashish Kumar; Singh, Manjeet; Thakur, Sanjeeve; Pani, Balaram; Kaya, Savas
    Organic compounds containing heteroatoms have been comprehended to exhibit a remarkable tendency towards corrosion mitigation. This corrosion mitigating tendency is enabled by the presence of electron clouds composed of lone pairs, pi-electrons, which allow them to be adsorbed over metallic equivalents. Because of the availability of nitrogen as heteroatoms, these compounds are being extensively used for corrosion diminution. This article looks at a variety of heterocyclic organic compounds like imidazole, triazole, pyridine, pyrazole, quinoline, tetrazole, pyrimidine, purine and pyrrole, having nitrogen as their prime constituent heteroatom for their anti-corrosive properties. The anti-corrosive properties of these nitrogen-based compounds in acidic conditions have been demonstrated using all available experimental techniques such as EIS, PDP and other theoretical investigations such as DFT and MD. Furthermore, the shift in the trend of these compounds inhibitory efficiencies has been noted and underlined here.
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    An insight about the interaction of Aryl Benzothiazoles with mild steel surface in aqueous HCl solution
    (Elsevier, 2022) Sheetal; Sengupta, Sirsendu; Singh, Manjeet; Thakur, Sanjeeve; Pani, Balaram; Banerjee, Priyabrata; Kaya, Savas
    The arrival of organic moieties as corrosion inhibitors has expanded the research in the past few years which, as a result; involved different heteroatoms to be tested for their anti-corrosive potential. The presented research is focused on the synthesis of the aryl-substituted benzothiazoles namely 6-(4Chlorophenyl) benzo[d]thiazol-2-amine (CBTA), 6-(p-tolyl) benzo[d]thiazol-2-amine (TBTA), and 6-(4methoxyphenyl) benzo[d]thiazol-2-amine (MBTA), and investigation of their anti-corrosive behaviour on mild steel in 1 M HCl particularly. Here, gravimetric and electrochemical analyses have been employed to examine the tendency of benzothiazoles to safeguard mild steel. Corrosion impeding efficacies were found to follow a significant order; MBTA > TBTA > CBTA. Further, experimental analysis unveiled the effect of substituents on corrosion mitigating potential i.e., MBTA employed the ligation of methoxy group; an enhanced electron cloud thus providing a maximum shield. The addition of corrosion inhibitors in acidic solution brought an elevation in activation energy thus retarded the rate of corrosion. Surface analysis via atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) confirmed the experimental results and attributed the presence of an adsorbed layer over mild steel surface thus providing protection from corrosion. Additionally, Quantum calculations such as density functional theory (DFT) and molecular dynamics (MD) provided an insight into the adsorption of inhibitors over mild steel at a molecular level.(c) 2022 Elsevier B.V. All rights reserved.