Electrochemical and Quantum Chemical Studies of Aromatic Amines on the Steel Corrosion in Acid Solution

Hosseini, S.M.A.; Salari, Mehdi; Jamalizadeh, Effat; Jafari, Amir

doi:10.5006/0494

Cited by 11 publications

(3 citation statements)

References 60 publications

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“…Quantum chemical calculations can provide insight into the design of inhibitor systems with superior properties and elucidate the adsorption process at a molecular level [21][22][23][24][25][26]. The Dmol 3+ and Discover modules of the Materials Studio 7.0 software (Accelrys Inc.) were employed for the quantum chemical calculations.…”

Section: Theoretical Calculationsmentioning

confidence: 99%

An Investigation of a Combined Thiourea and Hexamethylenetetramine as Inhibitors for Corrosion of N80 in 15% HCl Solution: Electrochemical Experiments and Quantum Chemical Calculation

Wang

et al. 2015

International Journal of Corrosion

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The inhibition mechanism of thiourea (TU) and hexamethylenetetramine (HMTA) mixed in 15% HCl solution on N80 surface was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy measurements, and surface morphology analysis. Quantum chemical calculations and molecular dynamics simulations were performed to study the properties of TU and HMTA. The results showed that the inhibitors can form strong bonds and stable films on the surface, which inhibits the cathodic and anodic reactions in HCl solution and reduces the diffusion coefficients of corrosive particles.

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Section: Theoretical Calculationsmentioning

confidence: 99%

An Investigation of a Combined Thiourea and Hexamethylenetetramine as Inhibitors for Corrosion of N80 in 15% HCl Solution: Electrochemical Experiments and Quantum Chemical Calculation

Wang

et al. 2015

International Journal of Corrosion

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“…The effectiveness of three aromatic amines (4,5-dinitrobenzene-1,2-diamine, 4-nitrobenzene-1,2-diamine, and 5-nitrobenzene-1,2,4-triamine) as corrosion inhibitors for mild steel in 0.5 M H 2 SO 4 solution at 25°C was studied by Hosseini et al (2012). The inhibition effectiveness of these Chem.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition and surface analysis of amines on mild steel in chloride medium

et al. 2016

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In this study, the corrosion inhibition effectiveness of eight amines, i.e. 2-ethylhexyl amine, aniline, benzylamine, butylamine, ethylamine, isopropylamine, octylamine, and triethanolamine, on C15 grade mild steel in 3 wt% NaCl solution is reported. The corrosion inhibition performance of the amines was studied using immersion tests at 25 and 70°C, with and without the addition of KI as a possible intensifier. Among the inhibitors tested at 0.1 wt% concentration, the lowest corrosion rates were obtained for specimens immersed in solutions containing 2-ethylhexyl amine at 25°C and triethanolamine at 70°C. The highest inhibition effectiveness at 25°C among all amines tested was obtained for 1.0 wt% butylamine with the addition of 0.5 wt% KI, while at 70°C the lowest corrosion rate was obtained for specimens inhibited with 1.0 wt% isopropylamine. Surface analysis was subsequently performed on specimens inhibited by the most effective inhibitors. Adsorption of the selected amines on the C15 grade mild steel surface was confirmed by ATR-FTIR. 3D-profilometry showed a reduction in the surface roughness (less corroded) for the specimens inhibited with these inhibitors compared to the non-inhibited specimens.Contact angle measurements showed that all of the tested specimens were hydrophilic.

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“…The ability of HQAS to protect QT800‐2 steel in hydrochloric acid solution was studied using weight loss measurement, electrochemical methods, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM) as well as energy dispersive spectrometer (EDS). Recently, many researchers use quantum chemical methods to interpret the inhibition efficiency mechanism at a molecular level …”

Section: Introductionmentioning

confidence: 99%

Synthesis and evaluation of hexamethylenetetramine quaternary ammonium salt as corrosion inhibitor

Liu

Qiu

Shao

et al. 2019

Materials & Corrosion

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A novel corrosion inhibitor, hexamethylenetetramine quaternary ammonium salt, is synthesized using hexamethylenetetramine (HMTA) and bromohexane as main reactants. The inhibitive action of HQAS on QT800-2 steel in hydrochloric acid medium is evaluated by weight-loss method, electrochemical method, and quantum chemical calculation. The obtained results show that the efficiency of 0.5 wt% HQAS inhibitor in 30 wt.% HCl solution at 363 K is 92.95% and HQAS can form an excellent synergistic effect with some additives. Polarization curves reveal that HQAS behaves as a mixed-type inhibitor with dominant anodic inhibition. Furthermore, the theoretical calculation verifies the relationship between the HQAS molecular structure and corrosion inhibition properties. K E Y W O R D Sacid inhibition, acid solutions, polarization, QT800-2 steel, quantum chemical calculation

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Electrochemical and Quantum Chemical Studies of Aromatic Amines on the Steel Corrosion in Acid Solution

Cited by 11 publications

References 60 publications

An Investigation of a Combined Thiourea and Hexamethylenetetramine as Inhibitors for Corrosion of N80 in 15% HCl Solution: Electrochemical Experiments and Quantum Chemical Calculation

An Investigation of a Combined Thiourea and Hexamethylenetetramine as Inhibitors for Corrosion of N80 in 15% HCl Solution: Electrochemical Experiments and Quantum Chemical Calculation

Corrosion inhibition and surface analysis of amines on mild steel in chloride medium

Synthesis and evaluation of hexamethylenetetramine quaternary ammonium salt as corrosion inhibitor

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