Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

Zhang, Weiwei; Li, Hui‐Jing; Wang, Yiwei; Liu, Ying; Wu, Yan‐Chao

doi:10.1002/maco.201810252

Cited by 45 publications

(6 citation statements)

References 39 publications

(50 reference statements)

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“…As described in Figure , the polarization curves obtained by each test system are almost identical in shape, which shows that the addition of CMT (Figure a), ECT (Figure b), Tween-80 (Figure c), or CMT/ECT + Tween-80 (Figure a,b) does not lead to changes in the electrochemical corrosion reaction mechanism of mild steel in hydrochloric acid solution. Moreover, β a and β c changed little with the use of the above inhibitors, which also indicated that these adsorptive inhibitors acted by simple blocking the active reaction sites on the steel surface without effecting the corrosion mechanism. , …”

Section: Resultsmentioning

confidence: 93%

“…Moreover, β a and β c changed little with the use of the above inhibitors, which also indicated that these adsorptive inhibitors acted by simple blocking the active reaction sites on the steel surface without effecting the corrosion mechanism. 27,28 Moreover, it is noteworthy from Figure 6 and Table 4 that the values of E corr after adding CMT/ECT shifted to negative with respect to the blank, and both the cathode and anode reactions were strongly suppressed, while the inhibition effect on the cathode was stronger. This observation suggested that CMT/ECT inhibitors were mixed-type inhibitors that predominantly restrained the cathode process, and the mode of action was "negative catalytic effect".…”

Section: Potentiodynamic Polarizationmentioning

confidence: 94%

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Synergistic Inhibition Effect of 9-(4-Chlorophenyl)-1,2,3,4-tetrahydroacridines and Tween-80 for Mild Steel Corrosion in Acid Medium

et al. 2019

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The synergistic inhibition effect of Tween-80 and 1,2,3,4-tetrahydroacridines, including 9-(4-chlorophenyl)-2-methyl-1,2,3,4-tetrahydroacridine (CMT) and ethyl 9-(4chlorophenyl)-1,2,3,4-tetrahydroacridine-2-carboxylate (ECT), on mild steel corrosion in 1 M HCl was investigated by using weight loss tests, electrochemical techniques, and surface morphology (SEM/SECM). The results indicated that the mixtures of CMT/ECT and Tween-80 strongly inhibit the corrosion of mild steel compared to individual inhibitors, and the adsorption mode belongs to the Langmuir isothermal type. Electrochemical measurements showed that the mixtures were mixed-type inhibitors, and a double-layer structure film with the inner layer of Tween-80 and the outer layer of CMT/ECT was formed on the steel surface. That the calculated synergistic parameter value was larger than unity illustrates that the enhancement of inhibition in the presence of Tween-80 is only due to synergistic action. Surface analysis techniques (SEM/SECM) verified that CMT and ECT were absorbed on the steel surface along with Tween-80 in the presence of mixtures, effectively controlling the metal corrosion.

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Section: Resultsmentioning

confidence: 93%

Section: Potentiodynamic Polarizationmentioning

confidence: 94%

Synergistic Inhibition Effect of 9-(4-Chlorophenyl)-1,2,3,4-tetrahydroacridines and Tween-80 for Mild Steel Corrosion in Acid Medium

et al. 2019

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“…For this study, the best model was obtained to be the Langmuir isotherm. The Langmuir adsorption isotherm is defined by the following equation:

\frac{italicC}{italicθ} = \frac{1}{K_{ads}} + italicC,

where K ads is the equilibrium constant for the adsorption–desorption process, C is the inhibitor concentration, and θ is the metal surface coverage. Figure illustrates the Langmuir isotherm plot ( C /θ vs. C ).…”

Section: Resultsmentioning

confidence: 99%

Increase corrosion resistance of mild steel in sulfuric acid and hydrochloric acid solutions by metoclopramide tablet

Golshani

Shahidi

Bahrami

2019

Materials & Corrosion

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In this article, metoclopramide tablet was thoroughly evaluated as an effective inhibitor for mild steel in 0.5 M sulfuric acid and 1 M hydrochloric acid solutions by different techniques (potentiodynamic polarization and electrochemical impedance spectroscopy [EIS]) and scanning electronic microscopy (SEM). The results revealed that the compound has a proper inhibiting effect at concentrations of 600 ppm for sulfuric acid and 300 ppm for hydrochloric acid solutions. The effect of temperature on the corrosion rate of alloy in the absence and presence of this drug was also studied. The EIS measurements revealed that by the addition of the inhibitor up to a certain concentration, the charge transfer resistance increases and the double layer capacitance decreases. The probe showed that the adsorption of the inhibitor on the alloy surface in both solutions follows Langmuir adsorption isotherm. This process is spontaneous and exothermic. The information obtained from SEM confirmed the formation of the protective layer on the surface of the sample after immersion in solutions containing the compound. K E Y W O R D Scorrosion inhibitor, electrochemical impedance spectroscopy, metoclopramide, mild steel

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“…It was found that the ph constant at around 100 Hz and also peak broad wing is maximum with increasing TBAB concentration due to TBAB molecules adsorbed the surface of the specimen. Their adsorption is proportional to the inhibitor concentrations [35][36] which for mild steel in 1NHCl solution. The results from covenant with weight loss method.…”

Section: Adsorption Isothermmentioning

confidence: 99%

EVALUATION OF TETRA-n-BUTYLAMMONIUM BROMIDE AS CORROSION INHIBITOR FOR MILD STEEL IN 1N HCl MEDIUM: EXPERIMENTAL AND THEORETICAL INVESTIGATIONS

Subasree¹,

Selvi²,

Arthanareeswari³

et al. 2020

RJC

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The corrosion inhibition behavior of Tetra-n-butylammonium bromide (TBAB) on mild steel (MS) in 1N HCl was investigated through experimental and theoretical studies. Inhibition efficiency is found to have increased by a rise in the concentration of TBAB. Experimental (weight loss study, potentiodynamic polarization, electrochemical impedance spectroscopy) results suggested that TBAB exhibits better inhibition efficiency. Thermodynamic studies were discussed. TBAB on the mild steel surface obey Langmuir adsorption isotherm. SEM and AFM studies confirm the adsorption and protective ability of TBAB on mild steel in 1N HCl medium. Formation of a protective layer on mild steel was characterized by FT-IR, UV-Visible and XRD studies. Furthermore, quantum chemical parameters were calculated. The results demonstrate the adsorption capability of TBAB on mild steel in 1N HCl medium. Quantum chemical calculations are in good agreement with results obtained from experimental methods.

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Adsorption and corrosion inhibition properties of pyridine‐2‐aldehyde‐2‐quinolylhydrazone for Q235 steel in acid medium: Electrochemical, thermodynamic, and surface studies

Cited by 45 publications

References 39 publications

Synergistic Inhibition Effect of 9-(4-Chlorophenyl)-1,2,3,4-tetrahydroacridines and Tween-80 for Mild Steel Corrosion in Acid Medium

Synergistic Inhibition Effect of 9-(4-Chlorophenyl)-1,2,3,4-tetrahydroacridines and Tween-80 for Mild Steel Corrosion in Acid Medium

Increase corrosion resistance of mild steel in sulfuric acid and hydrochloric acid solutions by metoclopramide tablet

EVALUATION OF TETRA-n-BUTYLAMMONIUM BROMIDE AS CORROSION INHIBITOR FOR MILD STEEL IN 1N HCl MEDIUM: EXPERIMENTAL AND THEORETICAL INVESTIGATIONS

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