Synthesis and inhibitory effect of N,N'-bis(1-phenylethanol)ethylenediamine against steel corrosion in HCl Media

Sığırcık, Gökmen; Yıldırım, Deniz; Tüken, Tunç

doi:10.1016/j.corsci.2017.03.003

Cited by 142 publications

(37 citation statements)

References 58 publications

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“…Inspection of Table reveals that the values of E a in presence of inhibitor were higher (36.4 kJ mol −1 ) than that in absence of inhibitor solution (16.8 kJ mol −1 ). This indicates that the addition of PAQ inhibitor to the blank solution increases E a , which is a typical physisorption and has been reported by many researchers . However, Vračar and Dražić considered that the adsorption type could not be determined only from the change of activation energy, and that the removal of water molecules from the metal surface also required some activation energy because of the competitive adsorption between organic molecules and water.…”

Section: Resultssupporting

confidence: 54%

“…This indicates that the addition of PAQ inhibitor to the blank solution increases E a , which is a typical physisorption and has been reported by many researchers. [30][31][32] However, Vračar and Dražić [33] considered that the adsorption type could not be determined only from the change of activation energy, and that the removal of water molecules from the metal surface also required some activation energy because of the competitive adsorption between organic molecules and water. In other words, the physisorption process may be simultaneously accompanied by chemisorption, and vice versa.…”

Section: Effect Of Temperaturementioning

confidence: 99%

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Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

Zhang

Wang

et al. 2018

Materials & Corrosion

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A new organic compound pyridine‐2‐aldehyde‐2‐quinolylhydrazone (PAQ) was synthesized and its structure was characterized by 1H NMR and FTIR spectroscopy. The inhibition effect of PAQ on the Q235 steel corrosion was investigated with potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM)/energy dispersive X‐ray spectroscopy (EDX), and scanning electrochemical microscope (SECM). The inhibition mechanism was further studied in view of the effect of inhibitor concentration and temperature on the corrosion of steel. Polarization studies showed that the PAQ acted as a mixed‐type inhibitor. The adsorption of PAQ inhibitor on Q235 steel surface follows Langmuir adsorption isotherm and contains both physical and chemical type adsorptive. The formation and characteristic of protective layer on the steel surface were verified by surface analysis techniques (SEM, EDX, SECM).

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Section: Resultssupporting

confidence: 54%

Section: Effect Of Temperaturementioning

confidence: 99%

Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

Zhang

Wang

et al. 2018

Materials & Corrosion

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“…In general, the values of

Δ G_{ads}^{°}

are around −20 kJ/mol or less, the type of adsorption is regarded as physical sorption, while the values of

Δ G_{ads}^{°}

are about −40 kJ/mol or more, the adsorption is considered as chemical sorption. Whereas, the values range from −40 to −20 kJ/mol, the adsorption is a mixed type adsorption . It is obvious from Table that the calculated values of

Δ G_{ads}^{°}

lie between −31.19 and −45.27 kJ/mol for NTA‐ n in the temperature range of 293K–323K, which means that it is a mixed type adsorption involving both physisorption and chemisorption.…”

Section: Resultsmentioning

confidence: 93%

“…Whereas, the values range from −40 to −20 kJ/mol, the adsorption is a mixed type adsorption. [48] It is obvious from Table 2 that the calculated values of G Δ°a ds lie between −31.19 and −45.27 kJ/mol for NTA-n in the temperature range of 293K-323K, which means that it is a mixed type adsorption involving both physisorption and chemisorption. In addition, there is an increasing negative value of G Δ°a ds with the lengthening alkyl chain and rising temperature, which is matched by a comparable increase in stability of the adsorbed film of inhibitors.…”

Section: Theoretical Analysis 341 | Thermodynamic and Kinetic Studymentioning

confidence: 94%

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Chen

Jiang

Cheng

et al. 2019

Materials & Corrosion

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A new series of N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides (designated as NTA‐n, n = 8, 10, 12, 14, and 16) were synthesized. The electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization showed that NTA‐n could protect availably X70 steel from attack of HCl with an inhibition efficiency of about 95%. And the inhibition ability follows the following sequence: NTA‐8 < NTA‐10 < NTA‐12 < NTA‐14 < NTA‐16, suggesting that prolonging alkyl chain may enhance the inhibition capacity of the molecules. Theoretical investigation backs up well the experiment results. The correlation of theoretical calculation with the experiment results illustrated clearly double logarithmic relations between the corrosion current and the computed quantum chemical parameters such as the highest occupied molecular orbital energy ( E HOMO), energy gap (ΔE), molecular volume ( ν), electronegativity ( χ), the total energy of iron crystal with the adsorbed inhibitor molecule ( E total), the interaction energy of Fe (1 0 0) surface and inhibitor molecules ( E inhibitor), while an equation resembling Hammet relation was existed between the corrosion currents and the fraction of electrons transfer (ΔN). These linear correlations suggest the relation of the inhibitor structure with its inhibition activity: long alkyl chain and electron donating groups in NTA‐n will enhance the corrosion efficiency.

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“…Surface morphological studies were done by using SEM instrument analysis. Three samples of mild steel were analysed in which one was in the pure form, the second was immersed in 1 M H 2 SO 4 and the third sample was immersed in acid with inhibitor MPII [41,[68][69][70][71][72]. The SEM images clearly indicates the surface of mild steel with inhibitor was smooth as compared with the other two mild steel samples in pure form and immersed in 1 M H 2 SO 4 which confirms the formation of an inhibitive layer on the surface of mild steel [73,74].…”

Section: Surface Studiesmentioning

confidence: 99%

Experimental and computational studies of imidazolium based ionic liquid 1-methyl- 3-propylimidazolium iodide on mild steel corrosion in acidic solution

Parveen

Bashir

Thakur

et al. 2019

Mater. Res. Express

113

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Corrosion inhibitive property of ionic liquid 1-Methyl-3-propylimidazolium iodide (MPII) on Mild Steel in 1 M H 2 SO 4 was investigated by experimental and computational Studies. The inhibition efficiency of inhibitor MPII at various concentrations, temperature and time duration were studied by gravimetric measurements, potentiodynamic polarization techniques, electrochemical impedance spectroscopy (EIS), surface studies and computational studies. The results from potentiodynamic polarization studies revealed that inhibitor 1-Methyl-3-propylimidazolium iodide acts as a mixed type inhibitor with a high inhibition efficiency of 91% at 298 K. Adsorption of the inhibitor on the surface of mild steel follows the Langmuir adsorption isotherm. The mechanism of adsorption was also validated by quantum chemical studies. Morphology and topography of the Mild Steel surface with and without the inhibitor were investigated by SEM. Thermodynamic parameters for adsorption like adsorption equilibrium (K ads ), DH , ads DS , ads Free energy of adsorption i.e. ΔG ads were also calculated so as to project the mechanism of adsorption. Computational data obtained from the Density functional theory (DFT) were used to acquire detailed theoretical insights. Appreciably Electrochemical impedance spectroscopy, Molecular dynamic simulation and quantum chemical calculation confirms the interaction of inhibitor with metal which leads to increases in inhibition efficiency.

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Synthesis and inhibitory effect of N,N'-bis(1-phenylethanol)ethylenediamine against steel corrosion in HCl Media

Cited by 142 publications

References 58 publications

Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Experimental and computational studies of imidazolium based ionic liquid 1-methyl- 3-propylimidazolium iodide on mild steel corrosion in acidic solution

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