The effect of temperature and concentration on the inhibition of acid corrosion of carbon steel by newly synthesized Schiff base

Gürten, A. Ali; Keleş, Hülya; Bayol, Emel; Kandemi̇rlı, Fatma

doi:10.1016/j.jiec.2014.11.046

Cited by 51 publications

(23 citation statements)

References 72 publications

(59 reference statements)

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“…The positive sign of ΔH ads reveals that the adsorption of inhibitor molecules is an endothermic process and the negative value suggests exothermic adsorption. Generally, an exothermic adsorption process suggests either physisorption or chemisorption while endothermic process is attributed to chemisorption [14,20]. When the process of adsorption is exothermic, physisorption can be distinguished from chemisorptions according to the absolute value of ΔH ads .…”

Section: Adsorption Isotherm and Thermodynamic Parametersmentioning

confidence: 99%

“…The choice of the inhibitor is based on two considerations, fi rstly, economic consideration and, secondly, high inhibition effi ciency. Both features obviously can be combined within the same molecule such as Schiff bases [12][13][14][15]. In the past few years, the corrosion inhibition of various metals such as aluminum, and of steel in acid solutions by Schiff bases with environmental considerations has attracted more attention [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

Danaee

Bahramipanah

2016

Russ J Appl Chem

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The inhibition ability of N,N '-bis(2,4-dihydroxyacetophenone)-1,3-propandiimine (DHAPP) as a schiff base against the corrosion of API-5L-X65 in 1 M HCl solution was evaluated by polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. Polarization studies indicated that DHAPP retards both the cathodic and anodic reactions through chemical adsorption and blocking the active corrosion sites. The adsorption of this compound obeyed the Langmuir adsorption isotherm. The inhibition effi ciency increased with inhibitor concentration and decreased with increasing temperature. EIS data analysed to equivalent circuit model showed that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy, and Gibbs free energy of activation and adsorption were calculated. Gibbs free energy indicated that adsorption occurred through physical and spontaneous process. Scanning electron microscopy was used to study the steel surface with and without inhibitor.The inhibition ability of N,N '-bis(2,4-dihydroxyacetophenone)-1,3-propandiimine (DHAPP) as a schiff base against the corrosion of API-5L-X65 in 1 M HCl solution was evaluated by polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. Polarization studies indicated that DHAPP retards both the cathodic and anodic reactions through chemical adsorption and blocking the active corrosion sites. The adsorption of this compound obeyed the Langmuir adsorption isotherm. The inhibition effi ciency increased with inhibitor concentration and decreased with increasing temperature. EIS data analysed to equivalent circuit model showed that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy, and Gibbs free energy of activation and adsorption were calculated. Gibbs free energy indicated that adsorption occurred through physical and spontaneous process. Scanning electron microscopy was used to study the steel surface with and without inhibitor.

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Section: Adsorption Isotherm and Thermodynamic Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

Danaee

Bahramipanah

2016

Russ J Appl Chem

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“…Meanwhile, the formation of organic compound metal complexes could be realized by functional electronegative groups and π-bonds of Schiff bases, which includes triple and conjuagated double bonds [14]. Schiff bases derived from thiocarbohydrazide have both features, which act as powerful coordination reagents and thereby enable the formation of air-stable complexes with metal ions [18,19]. It is reported that the amine-and thione-substituted triazoles, derived by the condensation of the derivatives of 1,2,4-triazine and the aldehyde or ketone, exhibited a strong affinity to some metal ions, such as Cu(II), Zn(II), Pb(II), Cr(III), Co(II), Ni(II), Mn(II) and Fe(II) [11,15,20].…”

Section: Introductionmentioning

confidence: 99%

Separation of Molybdenite from Chalcopyrite in the Presence of Novel Depressant 4-Amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one

Yin

Sun

et al. 2017

Minerals

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Abstract:In this paper, 4-amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (ATDT) was synthesized and introduced as a depressant for selective flotation separation of molybdenite from chalcopyrite. Its flotation performance and adsorption mechanism on minerals were first investigated by flotation, UV spectra, zeta potential, Fourier Transform Infrared Spectroscopy (FT-IR), and X-ray Photoelectron Spectroscopy Measurements (XPS). The bench scale tests indicated that ATDT exhibited stronger depressing power than chalcopyrite, and the selective index of Mo/Cu improved significantly in the presence of ATDT. The results of the UV spectra, zeta potential and FT-IR demonstrated that ATDT chemisorbed on the chalcopyrite surface. The XPS results further confirmed that ATDT might chemisorb onto the chalcopyrite surface through S and N atoms to form five-membered chelate rings and a postulated adsorption mode was presented. For molybdenite, the different measurements agreed well with each other and implied that ATDT might weakly physisorb onto a molybdenite surface.

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“…But corrosion is also an important issue in industry [50,51], being closely related to lubrication. Some N-alkylpiridinium compounds even have anticorrosive properties [52].…”

Section: Introductionmentioning

confidence: 99%

Corrosion activity and solubility in polar oils of three bis(trifluoromethylsulfonyl) imide/bis(trifluoromethylsulfonyl) amide ([NTF 2 ]) anion-based ionic liquids

Fernández-González

Mallada

Viesca

et al. 2017

Journal of Industrial and Engineering Chemistry

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The corrosion behaviour and solubility of three bis (trifluoromethylsulfonyl) , as a component in a mixture with different base oils were analysed. Six polar oils suitable for use in lubrication were utilized as base oil. Solubility tests were performed by using turbidimetry, and corrosion was checked at 4 v/v% by examining the roughness and chemical composition of the surface after 21 days. The results showed that long carbon chains in the cation improve the solubility greatly in diesters and slightly in polyolesters. Corrosion was not detected at this concentration.

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The effect of temperature and concentration on the inhibition of acid corrosion of carbon steel by newly synthesized Schiff base

Cited by 51 publications

References 72 publications

Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

Separation of Molybdenite from Chalcopyrite in the Presence of Novel Depressant 4-Amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one

Corrosion activity and solubility in polar oils of three bis(trifluoromethylsulfonyl) imide/bis(trifluoromethylsulfonyl) amide ([NTF 2 ]) anion-based ionic liquids

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