An investigation of chloride-substituted Schiff bases as corrosion inhibitors for steel

Emregül, Kaan C.; Kurtaran, Raıf; Atakol, Orhan

doi:10.1016/s0010-938x(03)00103-3

Cited by 141 publications

(54 citation statements)

References 22 publications

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“…The values of heat of adsorption of the sulfonamides on mild steel surface were calculated using Eq. (19). The values of Q ads (see Table XII) calculated were negative and ranged from À22.59 to À88.98 kJ/mol indicating that the adsorption of the sulfonamides on mild steel surface is exothermic.…”

Section: Adsorption Considerationsmentioning

confidence: 96%

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Theoretical studies of some sulphonamides as corrosion inhibitors for mild steel in acidic medium

Ebenso

Arslan

Kandemi̇rlı

et al. 2010

Int J of Quantum Chemistry

148

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Density functional theory (DFT) at the B3LYP/6-31G (d,p) and BP86/ CEP-31G* basis set levels and ab initio calculations using the RHF/6-31G (d,p) methods were performed on four sulfonamides (namely sulfaacetamide (SAM), sulfapyridine (SPY), sulfamerazine (SMR), and sulfathiazole (STI)) used as corrosion inhibitors for mild steel in acidic medium to determine the relationship between molecular structure and their inhibition efficiencies (%IE). The order of inhibition efficiency obtained was SMR > SPY > STI > SAM which corresponded with the order of most of the calculated quantum chemical parameters namely E HOMO (highest occupied molecular orbital energy), E LUMO (lowest unoccupied molecular orbital energy), the energy gap (DE), the Mulliken charges on the C, O, N, S atoms, hardness (g), softness (S), polarizability (a), dipole moment (l), total energy change (DE T ), electrophilicity (x), electron affinity (A), ionization potential (I), the absolute electronegativity (v), and the fraction of electrons transferred (DN). Quantitative structure activity relationship (QSAR) approach has been used and a correlation of the composite index of some of the quantum chemical parameters was performed to characterize the inhibition performance of the sulfonamides studied. The results showed that the %IE of the sulfonamides was closely related to some of the quantum chemical parameters but with varying degrees/order. The calculated %IE of the sulfonamides studied was found to be close to their experimental corrosion inhibition efficiencies. The experimental data obtained fits the Langmuir adsorption isotherm. The negative sign of the E HOMO values and other thermodynamic parameters obtained indicates that the data obtained supports physical adsorption mechanism.

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Section: Adsorption Considerationsmentioning

confidence: 96%

“…Heteroatoms, such as sulfur, phosphorus, nitrogen, and oxygen, together with aromatic rings in their structure are the major adsorption centers. The planarity and the lone electron pairs in the heteroatoms are important features that determine the adsorption of molecules on the metallic surface [18,19].…”

Section: Introductionmentioning

confidence: 99%

Theoretical studies of some sulphonamides as corrosion inhibitors for mild steel in acidic medium

Ebenso

Arslan

Kandemi̇rlı

et al. 2010

Int J of Quantum Chemistry

148

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show abstract

“…Res. 4(11), 2235-2246 2236 species to the surface of metal [10][11][12][13][14][15][16] . Different inquires about uncovered that the influenced of adsorption not only the charge surface and nature of the metal, but also by the chemical assembled of inhibitors.…”

Section: Issn: 2320-5407mentioning

confidence: 99%

Electrochemicaland Surface Characterization Studies on C38 Steel in 1 M Hydrochloric Acid Medium Using Prop-2-en-1-One Derivatives as Corrosion Inhibitors.

Abdulwahed¹,

Younis²,

Hassan³

et al. 2016

IJAR

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“…The average value of Q ads was -18.78 kJ/mol. The value of Q ads was negative this indicates that the process under study is spontaneous [25]. Generally, value of Q ads up to -20 kJ.mol -1 is consistent with electrostatic interaction between the charged molecules and the charged metal (physisorption) while those around -40 kJ.mol -1 or higher than that are associated with chemisorptions as a result of sharing or transferring of electrons from the organic molecules to the metal surface to form a coordinate type of bond [26].…”

mentioning

confidence: 98%

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Khadom¹

2014

J. Chil. Chem. Soc.

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The corrosion of copper -nickel alloy in hydrochloric acid was investigated at different temperatures, inhibitor concentrations, and corrosive solution rotation rates. Weight loss technique was used to evaluate the corrosion rate data. Tetraethylenepentamine was used as organic corrosion inhibitor, while hydrochloric acid was the corrosive solution. Different parameters, such as inhibitor efficiency, activation energy were obtained. Corrosion rate increased with both temperature and acid rotation rate, while it decreased with increases of Tetraethylenepentamine concentration. Maximum inhibitor efficiency was at lower level of temperature, acid rotation rate and higher level of inhibitor concentration.

show abstract

An investigation of chloride-substituted Schiff bases as corrosion inhibitors for steel

Cited by 141 publications

References 22 publications

Theoretical studies of some sulphonamides as corrosion inhibitors for mild steel in acidic medium

Theoretical studies of some sulphonamides as corrosion inhibitors for mild steel in acidic medium

Electrochemicaland Surface Characterization Studies on C38 Steel in 1 M Hydrochloric Acid Medium Using Prop-2-en-1-One Derivatives as Corrosion Inhibitors.

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

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