Inhibiting effects of some mercapto-triazole derivatives on the corrosion of mild steel in 1.0 M HCl medium

Wang, Hui‐Long; Rui-bin, Liu; Xin, Jian

doi:10.1016/j.corsci.2004.01.023

Cited by 214 publications

(87 citation statements)

References 21 publications

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“…Compounds rich in heteroatoms can be regarded as environmental friendly inhibitors because of their characteristic strong chemical activity and low toxicity [12]. The adsorption characteristics of organic molecules are also affected by sizes, electron density at the donor atoms and orbital character of donating electrons [13][14][15][16]. Organic compounds containing hetero atoms in the functional groups, pi-electron in triple or conjugated double bonds and presence of aromatic rings in their structure are the major adsorption centres and are usually good inhibitors [17].…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

2014

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Background A new class of nicotinamide derivatives viz., N-((1H-pyrrol-2-yl)methylene)nicotinamide, N-((methyl-(phenyl)amino)methylene)nicotinamide, N-nicotinoylbenzimidothioic acid and N-(4-(methylthio)benzylidene)nicotinamide have been synthesized and their corrosion inhibition effect on mild steel in 0.5 M HCl was investigated by mass loss, Tafel polarization technique and AC impedance measurements. Results The inhibition efficiency of the inhibitors on mild steel in 0.5 M HCl has been studied based on concentration, time interval and temperature. Potentiodynamic polarization studies showed that all the examined inhibitors suppress both anodic and cathodic process and behave as mixed type of corrosion inhibitors. Conclusions The adsorption of all the inhibitors was found to obey Langmuir isotherm model. Electrochemical impedance data revealed that polarization resistance (R P ) increases and double layer capacitance (C dl ) decreases as the concentration of the inhibitors increases. FTIR, EDX and SEM analyses were performed to study the film persistency of the inhibitors.

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Section: Introductionmentioning

confidence: 99%

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

2014

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“…The factors affecting the adsorption of these molecules, such as functional groups, steric factor, molecular size, electron density at the donor atoms and orbital character of donating electrons had been considered and discussed in terms of their inhibiting abilities. The inhibition efficiency has been closely related to the inhibitor adsorption abilities and the molecular properties for different kinds of organic compounds [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The power of the inhibition depends on the molecular structure of the inhibitor.…”

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

149

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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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“…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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Inhibiting effects of some mercapto-triazole derivatives on the corrosion of mild steel in 1.0 M HCl medium

Cited by 214 publications

References 21 publications

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

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.

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