New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

Adawy, Ahmed I.; Abbas, Mohamed A.; Zakaria, Khaled

doi:10.1007/s11164-015-2219-7

Cited by 50 publications

(9 citation statements)

References 65 publications

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“…This indicates that adsorption is spontaneous, and spontaneity is favored as temperature decreases. Also, for the studied temperature range, the absolute values of ∆G˚ads < 40 kJ/mol suggesting physical adsorption process [16]. The value of ∆Hads is negative indicating an exothermic process which is consistent with physical adsorption.…”

Section: Table (3) Parameters Of Langmuir and El-awady Adsorption Isosupporting

confidence: 56%

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Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution Using Extraction of Linum Usitatissimum Seeds

Elgahawi

Gobara²,

Baraka³

et al. 2017

International Conference on Aerospace Sciences and Aviation Tec

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Inhibitive effect of Linum Usitatissimum (LU) on the acid corrosion of mild steel in 1M H2SO4 solution was studied by weight loss, Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Linum Usitatissimum effectively inhibited the corrosion of mild steel with efficiency ranges from 85.7 to 95.5 % for LU concentrations from 80 to 1200 ppm. EIS showed that the charge transfer governs the corrosion process of mild steel in 1M H2SO4 solution. Adsorption isotherm study was performed using weight loss measurements where Langmuir and El-Awady models were applied on data to investigate the model of adsorption. Corrosion inhibition was also tested at different temperatures to measure the thermodynamic parameters; ΔG°, ΔH°, ΔS° and Ea. Inhibition was suggested to occur due to adsorption phenomenon and data obey the Langmiur model. Thermodynamic study reveals that adsorption is exothermic-physical process driven by entropic factors. The morphology study using SEM confirms the electrochemical investigation where the corrosion resistance increases with increase of inhibitor concentration.

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Section: Table (3) Parameters Of Langmuir and El-awady Adsorption Isosupporting

confidence: 56%

“…FTIR technique has been used to confirm the adsorption of the organic inhibitor on different metal surfaces [16,22]. The FTIR spectra of LU and the layer formed on the metal surface after 72 hr immersion in a corrosive solution containing 1200 ppm of LU are shown in Figs.…”

Section: Fourier Transformation Infra-red (Ftir) Analysismentioning

confidence: 99%

Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution Using Extraction of Linum Usitatissimum Seeds

Elgahawi

Gobara²,

Baraka³

et al. 2017

International Conference on Aerospace Sciences and Aviation Tec

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“…The plot between C/θ and C gave a straight line (Fig.3), which suggests that the adsorption of the inhibitor molecules on the metal surface obeyed the Langmuir adsorption model [50]. The values of the linear regression coefficient (r) slope and adsorption coefficients of the different inhibitors are listed in Table 7.…”

Section: Inhibitor Dosementioning

confidence: 76%

Biocidal activity and corrosion inhibition of some cationic surfactants derived from Thiol polyurethane.

Zaky

Sabbah²,

Negm

et al. 2017

Egypt. J. Chem.

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SIX series of cationic polyurethane surfactants were synthesized by the reaction between different six esters (which prepared by condensation of fatty alcohols namely: octanol, decanol, dodecanol, tetradecanol, hexadecanol and octadecanol with bromoacetic acid) and polyurethane as quaternizing agent. The chemical structures of these surfactants were confirmed using elemental analysis, FTIR spectra, + HNMR and UV analysis. The surface activities of the synthesized cationic thiol polyurethane surfactants showed their tendency towards adsorption at the air/water interface. The adsorption tendency was estimated from the values of surface tension and the depression of surface tension at the critical micelle concentration. The studied surfactants were evaluated as antimicrobial agents against pathogenic and sulfur reducing bacteria using inhibition zone diameters and minimum inhibition concentration values. The synthesized cationic thiol polyurethane surfactants showed good antimicrobial activities against the tested microorganisms including Gram positive, Gram negative as well as fungi. The synthesized compounds were tested for the activity as corrosion inhibitors against carbon steel corrosion in 2N H 2 SO 4 at 50, 100, 200, 400 and 600 ppm. The inhibition efficiencies of the tested compounds showed good inhibition and protection of the carbon steel. The corrosion inhibition tendency correlated to the surface activity and chemical structure of the compounds.Keywords: Cationic surfactants, Surface activity, Adsorption , Antimicrobial activity, Corrosion inhibition, Polyurethane. IntoductionCorrosion inhibitors are added to prevent metal dissolution during its surface cleaning from oxides and other adherent materials [1]. Also, corrosion inhibitors may be liquids or powder form that effectively reduces the corrosion rate by adsorbing on the metal surface [2,3]. Corrosion inhibition efficiency of organic compounds is related to their adsorption properties [4]. Corrosion protection of steel in acidic media is of great importance for both industrial facilities and theoretical aspects [5]. The adsorption of these molecules depends mainly on certain physicochemical properties of the inhibitor molecule such as the presence of heteroatoms including: oxygen, sulfur, nitrogen atoms and multiple bonds in the molecule through which they are adsorbed on the metal surface [6][7][8][9][10].Heteroatoms such as nitrogen, oxygen, and sulfur are capable of forming coordinate covalent bond with metal owing to their free electron pairs and thus acting as inhibitor. Compounds with π bonds generally exhibit good inhibitive properties due to the interaction of π orbital with metal surface [11][12][13]. The selection of a suitable inhibitor for a particular system is a difficult task because of the selectivity of the inhibitors and wide variety of corrosive environment. As a result, several types of corrosion inhibitors were developed to fit the different types of corrosion processes and also the medium where the corrosion takes place. Cor...

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“…The increase in the value of R ct due to the adsorption of NI Surf. on the MS surface (38,39). Corrosion inhibition was increased by increasing the NI Surf.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the anticorrosion performance of mild steel in sulfuric acid using synthetic non-ionic surfactants: practical and theoretical studies

Abdallah

Guesmi

Al-Gorair

et al. 2021

Green Chemistry Letters and Reviews

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The anticorrosion potency of Sabic mild steel (MS) in 0.5 M H 2 SO 4 solution was enhanced by three synthetic non-ionic surfactants (NI Surf.) containing pyridine and pyrimidine derivatives. These compounds are safe, environmentally friendly, and harmless to human health. Chemical and electrochemical measurements were used to compute the corrosion parameters. The anticorrosion efficacy increases with increasing the concentration of NI Surf. and with lowering temperature, surface and interfacial tension, and critical micelle concentration. The effectiveness of anticorrosion is interpreted due to the spontaneous horizontal adsorption on the surface of MS by the existence of some active centers that facilitate the adsorption. The adsorption process obeys Temkin isotherm. Potentiodynamic polarization elucidated that the synthetic NI Surf. acted as mixed-type inhibitors. Some surface properties were determined and confirm the anticorrosive effect of these molecules. Quantum chemical parameters as reactivity descriptors were carried out. It should be noted that the results obtained from computational calculations of the specifications are in full agreement with the experimental observations. There is good compatibility between the anticorrosion efficiency obtained from various techniques and surface properties and quantum chemical calculation.

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New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

Cited by 50 publications

References 65 publications

Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution Using Extraction of Linum Usitatissimum Seeds

Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution Using Extraction of Linum Usitatissimum Seeds

Biocidal activity and corrosion inhibition of some cationic surfactants derived from Thiol polyurethane.

Enhancing the anticorrosion performance of mild steel in sulfuric acid using synthetic non-ionic surfactants: practical and theoretical studies

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