Experimental and theoretical studies for mild steel corrosion inhibition in 1M HCl by two new benzothiazine derivatives

Ghailane, Tourya; Balkhmima, R.A.; Ghailane, Rachida; Souizi, Abdelaziz; Touir, R.; Touhami, M. Ebn; Marakchi, K.; Komiha, N.

doi:10.1016/j.corsci.2013.06.052

Cited by 139 publications

(54 citation statements)

References 43 publications

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“…For a quantitative evaluation of the effects of castor bark powder addition in the corrosion resistance of the CS AISI 1020, impedance diagrams were fitted using the electrical equivalent circuit (EEC) presented in Figure 4. The model is composed by a single time constant and has been commonly used to fit impedance diagrams of CS in acidic solutions, without or with inhibitor addition 17,32,[42][43][44] . In the circuit, R S is the solution resistance, R ct the charge transfer resistance and CPE dl is a constant phase element (CPE) accounting for the double layer capacity.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

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Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

et al. 2017

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The inhibition effect of castor bark powder obtained from Ricinus communis on AISI 1020 carbon steel in acidic media (HCl 0.5 mol.L -1 ) has been studied by electrochemical impedance spectroscopy (EIS), polarization curves, scanning vibrating electrode technique (SVET) and weight loss measurements. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were employed as characterization techniques. The EIS and gravimetric results showed that the inhibitory efficiency increases with inhibitor concentration achieving 83%. Polarization curves indicated that the castor bark powder acts as mixed inhibitor. The adsorption of the powder components on the metal surface follows the Langmuir isotherm. The FTIR analyses indicate the presence of C, N and O heteroatoms, incorporated in functional groups mainly related to the presence of carboxylic acids as ricinoleic acid, which could be responsible for the inhibitory properties of the powder. SEM analyses showed that the corrosion process was retarded in the presence of inhibitor in the electrolyte, which was confirmed by SVET measurements. Therefore, the results indicate that castor bark powder has potential to be a corrosion inhibitor for carbon steel in acidic media.

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Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…Therefore, modifications of the parameters ε and d can produce changes in C dl , which in Table 3 is proportional to CPE dl . Water molecules and/or chloride ions can be displaced from the electrode surface by the inhibitors molecules 44 , thus diminishing the dielectric constant of the double layer. In addition, the bigger size of the organic molecules with…”

mentioning

confidence: 99%

Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

et al. 2017

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“…. In the circuit, R s stands for the solution resistance, R ct represents the charge transfer resistance and CPE dl is a constant phase element representing the double layer charging, which accounts for frequency dispersion in the EIS response, usually ascribed to physical phenomena like roughness or non-homogeneity of the surface 32 . The impedance of a CPE is defined by Eq.…”

Section: Gravimetric Methodsmentioning

confidence: 99%

Study and Assessment of the Efficiency of the Cocoa Bark Extracted from the Theobroma Cacao as an Inhibitor of the Corrosion of Carbon Steel in Substitution of Benzotriazole

et al. 2017

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Corrosion represents high losses to the economy, therefore, researches on the minimization of its damages in materials, mainly the metallic ones, are necessary. Among the various alternatives of protection against corrosion, there is the application of corrosion inhibitors that can minimize or even stop the corrosive process of metallic materials. However, at present, substances usually used as corrosion inhibitors present high toxicity, being considered harmful components to the environment and to human health. Therefore, there is an urgent need for studies on viable corrosion inhibitors, by considering not only economic but also environmental costs. The present work studied the use of cocoa bark extract (Theobrama cacao L), for possible replacement of benzotriazole (BTAH) in the corrosion inhibition of ASTM 1020 carbon steel (CS-ASTM 1020) in 18.23 g.L -1 hydrochloric acid media. Weight loss measurements, anodic and cathodic potentiodynamic polarization curves and electrochemical impedance experiments were carried out. The results showed that the addition of the extract to the electrolyte effectively hinder the corrosion process and indicated its adsorption on the electrode surface. In addition, the inhibiting efficiency of the cocoa bark extract was only slightly inferior to BTAH, showing that it can be an environmentally friendly option to toxic inhibitors.

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“…33 The shape of the Nyquist doesn't change before and after the addition of HMTH, which demonstrates that the corrosion mechanism of carbon steel remains the same. 37 Yet, the diameter of the capacitive loops in the presence of HMTH is quite bigger than that in the absence of HMTH and increases with the inhibitor concentration, which can be ascribed to the forming of the protective layer on the carbon steel surface. All capacitive loops of EIS spectra were analyzed using the equivalent circuit in Fig.…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

Study of Adsorption Behavior and Inhibition Mechanism of Mild Steel in Hydrochloric Acid by a Novel Thiadiazole Derivative

Cong

et al. 2015

Electrochemistry

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N′-(4-hydroxy-3-methoxybenzylidene)-2-(5-p-tolyl-1,3,4-thiadiazol-2-ylthio) acetohydrazide (HMTH) was studied as a novel corrosion inhibitor for carbon steel in hydrochloric acid solution by potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), cyclic voltammetry (CV) techniques and Quantum chemical calculation. The surface morphology of carbon steel in HCl solution in the absence and presence of HMTH was investigated by scanning electron microscopy (SEM). The mechanism of adsorption was determined from Fourier transform infrared spectroscopy (FTIR) and the potential of zero charge (E pzc ). HMTH was found to be an effective corrosion inhibitor by forming a stable adsorption layer on carbon steel.

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Experimental and theoretical studies for mild steel corrosion inhibition in 1M HCl by two new benzothiazine derivatives

Cited by 139 publications

References 43 publications

Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

Study and Assessment of the Efficiency of the Cocoa Bark Extracted from the Theobroma Cacao as an Inhibitor of the Corrosion of Carbon Steel in Substitution of Benzotriazole

Study of Adsorption Behavior and Inhibition Mechanism of Mild Steel in Hydrochloric Acid by a Novel Thiadiazole Derivative

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