Abstract
The inhibition effect of synthesized diethyl 3,4-bis(4-methoxybenzylideneamino) thieno[2,3-b] thiophene-2,5-dicarboxylate (Inh I) and diethyl 3,4-bis(benzylideneamino) thieno[2,3-b] thiophene-2,5-dicarboxylate (Inh II), on corrosion of mild steel in 15% HCl solution was investigated using weight loss measurements, electrochemical polarization, and electrochemical impedance spectroscopy techniques. The experimental results show that the inhibition efficiency of studied inhibitors increased with the increase of inhibitors concentration but decreased with the increase of temperature. Corrosion inhibition efficiencies of 94.5% and 92.1% were obtained with 250 ppm of Inh I and Inh II at 303 K, respectively. The potentiodynamic polarization measurements indicate that the studied inhibitors act as mixed inhibitor. The thermodynamic parameters of the corrosion and adsorption processes were calculated and evaluated. The adsorption of these inhibitors was found to obey Langmuir adsorption isotherm. Scanning electron microscopy was used to characterize the surface morphology of the mild steel specimens in presence and absence of inhibitors. The mechanism of the inhibition process was discussed in the light of the chemical structure and quantum-chemical calculations of the investigated inhibitors.
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26 October 2018
"The editor has retracted this article [1] because Figure��7a-7d, as well as parts of the text, were duplicated from the following articles [2,3]."
26 October 2018
The editor has retracted this article [1] because Figure��7a-7d, as well as parts of the text, were duplicated from the following articles [2,3].
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Available online at http://link.springer.com/journal/40195.
The editor has retracted this article [1] because Figure 7a-7d, as well as parts of the text were duplicated from the following article [2]. There is also substantial overlap with article [3] that has been retracted due to duplicate publication [4]. The data reported in this article are therefore unreliable. All authors agree to this retraction.
1. M. Yadav et al, Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect on Mild Steel in Hydrochloric Acid by Thiophene Derivatives, Acta Metall. Sin. (Engl. Lett.), 2014, 27(1), 37–46. DOI 10.1007/s40195-013-0012-4
2. S.Kumar et al, Experimental and Quantum Chemical Studies on Corrosion Inhibition Effect of Synthesized Organic Compounds on N80 Steel in Hydrochloric Acid, Industrial & Engineering Chemistry Research, 2013, 52(39), 14019-14029. DOI: 10.1021/ie401308v
3. M.Yadav et al, Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect of Imidazole Derivatives on N80 Steel in Hydrochloric Acid, Surface Review and Letters, 2013, 20(6). DOI: 10.1142/S0218625X13500571
4. M. Yadav et al, Notice of Retraction: Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect of Imidazole Derivatives on N80 Steel in Hydrochloric Acid, Surface Review and Letters, 2018, 25(4), DOI: 10.1142/S0218625X18930010
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Yadav, M., Behera, D., Sinha, R.R. et al. RETRACTED ARTICLE: Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect on Mild Steel in Hydrochloric Acid by Thiophene Derivatives. Acta Metall. Sin. (Engl. Lett.) 27, 37–46 (2014). https://doi.org/10.1007/s40195-013-0012-4
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DOI: https://doi.org/10.1007/s40195-013-0012-4