Corrosion inhibition mechanism of carbon steel by sodium  N,N‐diethyl dithiocarbamate in hydrochloric acid solution

Fan, Hongbo; Wang, Hui‐Long; Guo, Xingpeng; Zheng, Jianming

doi:10.1108/00035590210431782

Cited by 19 publications

(4 citation statements)

References 19 publications

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“…The impedance data given in Tables I and II show that the charge transfer resistance R ct increases with an increase in inhibitor concentration while the double layer capacitance C dl decreases. Decreasing of the C dl values can be related to the gradual replacement of water molecules by the organic molecules on the metal surface, reducing the extent of dissolution reaction (Hong‐bo et al , 2002; Feng and Chen, 1997). In the presence of DT molecules, R ct increases more significantly with increasing the concentration.…”

Section: Discussionmentioning

confidence: 99%

Synergistic effect of 1‐dodecanethiol upon inhibition of Schiff bases on carbon steel corrosion in sulphuric acid media

Ehteshamzadeh

Shahrabi

Hosseini

2006

Anti-Corrosion Methods and Materials

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PurposeIn this paper, the main aim is to study the synergistic effects of alkanethiols upon inhibition of Schiff bases, N,N′‐ethylen‐bis and N,N′‐ortho‐phenylen‐bis in 0.5 M sulphuric acid solutions.Design/methodology/approachMeasurements were carried out in a three‐electrode cell assembly connected to the corrosion measurement system using software for Tafel polarization. Impedance measurements were carried out at open circuit potential using an electrochemical interface and frequency response analyzer at frequencies from 100 kHz to 10 MHz.FindingsResults obtained revealed that at high concentrations, each of the investigated Schiff bases and 1‐dodecanethiol (DT) were good inhibitors when added separately to the corrosive media. The decrease in corrosion rate was associated with an increase in their concentrations. It was found that the presence of DT together with Schiff bases in corrosive medium increased inhibition effect, especially at low concentrations. Synergistic effect is discussed from viewpoint of their co‐adsorption. The adsorption of combined inhibitors was found to follow Langmuir isotherm. Thermodynamic calculations revealed that adsorption of combined inhibitors had a physical nature.Research limitations/implicationsIn order to improve further the performance of Schiff bases and identifying their synergistic effects with other additives it is suggested that some more researches on other Schiff bases with other alkanethiol molecules must be done.Practical implicationsThe results of this paper can be used for acid cleaning of carbon steel in which suitable inhibitor systems with the highest efficiency is required.Originality/valueThis paper reveals that the presence of DT molecules in solution encourage the adsorption of Schiff bases by facilitating the electrostatic co‐adsorption of Schiff base molecules through a synergistic effect.

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Section: Discussionmentioning

confidence: 99%

Synergistic effect of 1‐dodecanethiol upon inhibition of Schiff bases on carbon steel corrosion in sulphuric acid media

Ehteshamzadeh

Shahrabi

Hosseini

2006

Anti-Corrosion Methods and Materials

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“…The most favorable types of compounds is those that contain polar atoms, such as oxygen, sulfur, phosphorus, nitrogen etc., which include a single pair of electrons that can be attracted to the metal surface by the adsorption process, forming a protective layer [13]. Dithiocarbamate is a ligand that can act as a corrosion inhibitor due to the presence of sulfur and nitrogen as electronegative atoms [14]. Recently, many studies were published that involve the utilization of metal-dithiocarbamate compounds (such as Zn(II) N-Isopropylbenzyldithiocarbamate) as corrosion inhibitors [15][16][17].…”

Section: Issn: 0067-2904mentioning

confidence: 99%

Estimation of the Efficiency of Corrosion Inhibition by Zn-Dithiocarbamate Complexes: a Theoretical Study

Kadhim¹,

Juber²,

Al‐Janabi³

2021

eijs

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Seven Zn-dithiocarbamate complexes were suggested as corrosion inhibitors. Density functional theory (DFT) was used to predict the ability of inhibition. Room temperature conditions were applied to suggest the optimization of complexes, physical properties, and corrosion parameters. In addition, the HOMO, LUMO, dipole moment, energy gap, and other parameters were used to compare the inhibitors efficiency. Gaussian 09 software with LanL2DZ basis set was used. Total electron density (TED) and electrostatic surface potential (ESP) were utilized to show the sites of adsorption according to electron density.

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“…It can prevent metal dissolution and reduce acid consumption (Soltani et al, 2016). As reported, various types of organic compounds act as corrosion inhibitors and contain multiple bonds in their structures that mainly contain nitrogen (N), sulfur (S) or oxygen (O) atoms (Hong-bo et. al., 2002, Hebbar et al, 2014.…”

Section: Introductionmentioning

confidence: 99%

Ni(II) Butylmethyldithiocarbamate: Physico-Chemical Properties, X-Ray Crystallography, DFT and Anti-Corrosion Screening in Different Acids

Othman¹,

Latif²,

Ghazali³

et al. 2021

ASMScJ

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In industrial sectors, pickling and acid cleaning are mutual processes where acid solutions, such as hydrochloric acid (HCl) and sulfuric acid (H2SO4), are used to eliminate the corrosion products yielded on metal surfaces; thus, improving the performance of the machineries. However, the usage of the acid could lead to another metal deterioration. Dithiocarbamate inhibitor is defined as an organic compound that has good corrosion inhibition properties that can work as an inhibitor in an acid environment. Dithiocarbamate (DTC) assists by reducing acid reactiveness which prohibits metal dissolution in the acid. In this study, the Ni(II) N-butylmethyldithiocarbamate (Ni[BuMedtc]2) complex was synthesised by using an in-situ method and characterised by elemental analyser, attenuated total reflection Fourier transform infrared (ATR-FTIR), ultraviolet-visible (UV-Vis) spectroscopy and X-ray crystallographic study, and the chemical properties of the Ni[BuMedtc]2 complex was successfully calculated by the Discrete Fourier Transform (DFT) approach. The experimental results which were obtained through the weight-loss analysis method in two different acids – 1 M HCl and 1 M H2SO4 – indicated that the inhibition efficiency increased as the inhibitor concentration increased. The outcome showed that the Ni[BuMedtc]2 performed better as an inhibitor in 1 M HCl as compared to in1 M H2SO4 to protect the metal exterior because H2SO4 is more corrosive due to the excessive presence of H+.

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Corrosion inhibition mechanism of carbon steel by sodium N,N‐diethyl dithiocarbamate in hydrochloric acid solution

Cited by 19 publications

References 19 publications

Synergistic effect of 1‐dodecanethiol upon inhibition of Schiff bases on carbon steel corrosion in sulphuric acid media

Synergistic effect of 1‐dodecanethiol upon inhibition of Schiff bases on carbon steel corrosion in sulphuric acid media

Estimation of the Efficiency of Corrosion Inhibition by Zn-Dithiocarbamate Complexes: a Theoretical Study

Ni(II) Butylmethyldithiocarbamate: Physico-Chemical Properties, X-Ray Crystallography, DFT and Anti-Corrosion Screening in Different Acids

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