Experimental and theoretical investigations of adsorption characteristics of itraconazole as green corrosion inhibitor at a mild steel/hydrochloric acid interface

Obot, I.B.; Ebenso, Eno E.; Obi-Egbedi, N.O.; Afolabi, Ayo Samuel; Gasem, Zuhair M.

doi:10.1007/s11164-012-0501-5

Cited by 37 publications

(19 citation statements)

References 52 publications

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“…This is due to the adsorption of PFLE on the metal surface leading to the formation of the protective layer on the electrode surface and decreasing the extent of dissolution reaction [31,32]. These results are in very good agreement with both weight loss and polarization data and can be attributed to decreased local dielectric constant and increased thickness of electrical double layer [33].…”

Section: Electrochemical Impedance Measurementssupporting

confidence: 75%

Adsorption and corrosion inhibiting behavior of Passiflora foetida leaf extract on mild steel corrosion

Muthumanickam¹,

Jeyaprabha²,

Karthik³

et al. 2015

Int. J. Corros. Scale Inhib.

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Passiflora foetida leaf extract (PFLE) as a corrosion inhibitor in 1 M HCl was investigated by weight loss method and electrochemical techniques. Inhibition efficiency of PFLE was found to increase with increasing concentration. Polarization measurements revealed that the PFLE acted as a mixed type inhibitor. Nyquist plots showed that on increasing the PFLE concentration, the charge transfer resistance increased and double layer capacitance decreased. The adsorption of PFLE on mild steel obeyed the Langmuir adsorption isotherm. The maximum inhibition efficiency was found to be 94.61% at 313 K in the presence of 130 ppm of PFLE. SEM and AFM techniques confirmed the adsorption of PFLE on mild steel surface.

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Section: Electrochemical Impedance Measurementssupporting

confidence: 75%

Adsorption and corrosion inhibiting behavior of Passiflora foetida leaf extract on mild steel corrosion

Muthumanickam¹,

Jeyaprabha²,

Karthik³

et al. 2015

Int. J. Corros. Scale Inhib.

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“…Therefore, DMPO can also accept electrons from Fe through these atoms. It has been reported that excellent corrosion inhibitors can not only offer electrons to unoccupied orbitals of the metal but also accept free electrons from the metal [42]. …”

Section: Resultsmentioning

confidence: 99%

Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies

Junaedi

Al-Amiery

Kadihum

et al. 2013

IJMS

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1,5-Dimethyl-4-((2-methylbenzylidene)amino)-2-phenyl-1H-pyrazol-3(2H)-one (DMPO) was synthesized to be evaluated as a corrosion inhibitor. The corrosion inhibitory effects of DMPO on mild steel in 1.0 M HCl were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, open circuit potential (OCP) and electrochemical frequency modulation (EFM). The results showed that DMPO inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiency increased with increasing inhibitor concentration. Changes in the impedance parameters suggested an adsorption of DMPO onto the mild steel surface, leading to the formation of protective films. The novel synthesized corrosion inhibitor was characterized using UV-Vis, FT-IR and NMR spectral analyses. Electronic properties such as highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy (EHOMO and ELUMO, respectively) and dipole moment (μ) were calculated and discussed. The results showed that the corrosion inhibition efficiency increased with an increase in the EHOMO values but with a decrease in the ELUMO value.

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“…In most cases, excellent corrosion inhibitors can not only offer e's to the d-orbital of the metal but also accept e's from the metal [25]. The decrease of the value of LUMO leads to the increase of the ability of e's acceptance of the molecule.…”

Section: Discussionmentioning

confidence: 99%

Semiempirical Theoretical Studies of 1,3-Benzodioxole Derivatives as Corrosion Inhibitors

El-Shamy

2017

International Journal of Corrosion

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The efficiency of 1,3-benzodioxole derivatives as corrosion inhibitors is theoretically studied using quantum chemical calculation and Quantitative Structure Activity Relationship (QSAR). Different semiempirical methods (AM1, PM3, MNDO, MINDO/3, and INDO) are applied in order to determine the relationship between molecular structure and their corrosion protection efficiencies. Different quantum parameters are obtained as the energy of highest occupied molecular orbitalEHOMO, the energy of the lowest unoccupied molecular orbitalELUMO, energy gapΔEg, dipole momentμ, and Mulliken charge on the atom. QSAR approach is applied to elucidate some important parameters as the hydrophobicity (Log P), surface area (S.A), polarization(P), and hydration energy (EHyd).

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Experimental and theoretical investigations of adsorption characteristics of itraconazole as green corrosion inhibitor at a mild steel/hydrochloric acid interface

Cited by 37 publications

References 52 publications

Adsorption and corrosion inhibiting behavior of Passiflora foetida leaf extract on mild steel corrosion

Adsorption and corrosion inhibiting behavior of Passiflora foetida leaf extract on mild steel corrosion

Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies

Semiempirical Theoretical Studies of 1,3-Benzodioxole Derivatives as Corrosion Inhibitors

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