Experimental and theoretical investigation of organic compounds as inhibitors for mild steel corrosion in sulfuric acid medium

Bahrami, M.J.; Hosseini, S.M.A.; Pilvar, P.

doi:10.1016/j.corsci.2010.04.024

Cited by 354 publications

(106 citation statements)

References 53 publications

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“…The molecular structures were first subjected to geometry optimization using COMPASS force field and then distribution of frontier molecular orbital including the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) obtained from this optimized structure. Although the experimental work here is done entirely in liquid phase, however, based on similar research work [1,[29][30][31] which has employed gas phase theoretical analysis to evaluate the liquid phase experimental results (they obtained satisfactory correlations between gas phase theoretical analysis and liquid phase experimental results), similar theoretical approach is followed.…”

Section: Theoretical Studymentioning

confidence: 99%

“…Similarly, E LUMO represents the ability of the molecule to accept electrons. The lower the values of E LUMO , the more probable it is that the molecule would accept electrons [1,29,30]. DE, the difference of E LUMO and E HOMO , is another important factor that should be considered.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Several researchers [1][2][3][4][5][6][7][8][9] have studied the effects of some synthetic organic inhibitors on the corrosion of steel in hydrochloric and sulphuric acid solutions. The efficiency of these inhibitors is related to the presence of polar functions with S, O or N atoms in the molecule, heterocyclic compounds and p-electrons [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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Background The inhibitive effect of the aqueous extract of Rothmannia longiflora (RL) on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions was investigated by weight loss measurement as well as potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Result The extract was found to efficiently inhibit the corrosion process in both environments and inhibition efficiency increased with increasing extract concentration as well as rise in temperature. Data from electrochemical measurements suggest that the extract functioned by adsorption of the organic matter on the metal/corrodent interface, inhibiting both the anodic and cathodic half reactions of the corrosion process. Conclusion The result obtained from this study clearly shows that RL functioned as a good inhibitor for the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions and the inhibiting efficiency value increased with the inhibitor concentration. The adsorption of the RL on the mild steel surface in acid solution obeyed Langmuir adsorption isotherm.

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Section: Theoretical Studymentioning

confidence: 99%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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“…Normally, a value of standard free energy up to " -20 kJ mol -1 " or less corresponds with the electrostatic interactions that exist between the charged surface electrode and the inhibitor species following the physisorption process. however, when the value of is close to "-40 kJ mol -1" or more indicate to share and transfer of electron density between metal surface and the inhibitor molecules and formed the coordinate bond between them ( define as chemical adsorption ) [60][61][62][63] . Accordingly, the values of both drug inhibitors are less than -40 kJ mol -1 , refers to the physisorption process occurred with electrostatic interactions and associated with other interactions may take place to enhance the adsorb protecting film on the surface electrode via chemical adsorption process.…”

Section: ………………(6)mentioning

confidence: 99%

“…Consequently, the cefixima and aminobenzylpenicillin inhibitors adsorbed on the carbon steel surface electrode in acidic solution through the physical and chemical adsorption types and predominantly with the chemical character [50,60,61].…”

Section: ………………(6)mentioning

confidence: 99%

A Study into the Corrosion Inhibition of Carbon Steel in Acidic Medium Using Eco-Friendly Compounds

2017

Irq. Nat. J. Chem.

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The corrosion inhibition effects of cefixima and aminobenzylpenicillin drug inhibitors in 0.05M deaerated sulfuric acid solution for carbon steel have been studied by using electrochemical techniques and quantum chemical calculations as well as scanning electron microscope (SEM). It is observed from the experimental findings that both compounds perform as good inhibitors and behave according to mixed type inhibitor in terms of their inhibitory action. Additionally, it was found the percentage of corrosion inhibition become maximal when the concentrations of the cefixima and aminobenzylpenicillin inhibitors are increased. The influence of temperature on the corrosion of carbon steel has been investigated and the activation energy values estimated. The corrosion efficiency decreases with increasing the temperature range. The parameters of thermodynamic have been determined and indicate that the adsorption mechanism follows the Langmuir isotherm model and forms a protective layer on carbon steel surface electrode, which was characterized by scanning electron microscope measurements, to prevent a corrosion process. Quantum chemical calculations have been performed to provide evidence for corrosion inhibition according to the chemical structures of the cefixima and aminobenzylpenicillin drug inhibitors.

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Amines as Corrosion Inhibitors

Verma

Quraishi

Ebenso

et al. 2021

Organic Corrosion Inhibitors

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Experimental and theoretical investigation of organic compounds as inhibitors for mild steel corrosion in sulfuric acid medium

Cited by 354 publications

References 53 publications

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

A Study into the Corrosion Inhibition of Carbon Steel in Acidic Medium Using Eco-Friendly Compounds

Amines as Corrosion Inhibitors

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