Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media

Kumaravel, M.; Rameshkumar, S.; Srikandan, Subramanian Sathy; Gowri, S.; Rajasekaran, N.; Arokiyaraj, Selvaraj

doi:10.1016/j.electacta.2011.02.036

Cited by 126 publications

(46 citation statements)

References 33 publications

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“…The simple -R(CR) -model best describes metal/solution interface. However the complex planes obtained are depressed semi circles, indicating a non-ideal capacity behavior of this interface 28,29 . This capacitance dispersion at the interfaces can be attributed to the surface roughness, the degree of polycrystallinity, the chemical inhomogeneities and anion adsorption 28,30 .…”

Section: Electrochemical Impedance Spectroscopic Studiesmentioning

confidence: 99%

“…This capacitance dispersion at the interfaces can be attributed to the surface roughness, the degree of polycrystallinity, the chemical inhomogeneities and anion adsorption 28,30 . A precise modeling for this situation is done by introducing a constant phase element (CPE) in the place of capacitor 28,30 and the corresponding equivalent circuit is shown in Figure 3.…”

Section: Electrochemical Impedance Spectroscopic Studiesmentioning

confidence: 99%

“…In both the media the corrosion potential is also shifted to more negative with respect to uninhibited solution to smaller extent with the addition of inhibitor. This indicates the decrease in rate of hydrogen evolution on the mild steel surface due to the adsorption of dye molecules onto the metal surface 28,33 . The shift in corrosion potential is not much larger with the addition of inhibitor.…”

Section: Potentiodynamic Polarization Studiesmentioning

confidence: 99%

“…These positively charged inhibitor molecules can't directly approach the positively charged metal surface due to electrostatic repulsive forces. However, the anions (Cl -and SO 4 2-ions) derived from the acids can directly get attached to the metal surface 28 . This indicates the adsorption of anions onto the metal surface by electrostatic attraction towards the metal surface to form first adsorption layer on the metal surface.…”

Section: Potential Of Zero Charge and The Inhibition Mechanismmentioning

confidence: 99%

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Colocid Dye - A Potential Corrosion Inhibitor for the Corrosion of Mild Steel in Acid Media

Sivakumar¹,

Velumani²,

Rameshkumar³

2018

Mat. Res.

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Corrosion inhibition nature of Colocid dye on the corrosion of mild steel in acid media was analyzed using weightloss and electrochemical methods. The results of electrochemical and weightloss studies indicated that Colocid acid could act as a potential inhibitor for mild steel in acid media. It has been observed that the inhibition efficiency increases with inhibitor concentration and the inhibition efficiency of Colocid acid dye for the corrosion of mild steel in 1.0 M HCl solution is larger than that in 0.5 M H 2 SO 4 solution.Potentiodynamic polarization studies showed that the dye molecule is of mixed type inhibitor. The adsorption of the compound on the mild steel surface obeyed Langmuir adsorption isotherm. The potential of zero charge was measured to find corrosion inhibition mechanism in these media.

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Section: Electrochemical Impedance Spectroscopic Studiesmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopic Studiesmentioning

confidence: 99%

Section: Potentiodynamic Polarization Studiesmentioning

confidence: 99%

Section: Potential Of Zero Charge and The Inhibition Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Colocid Dye - A Potential Corrosion Inhibitor for the Corrosion of Mild Steel in Acid Media

Sivakumar¹,

Velumani²,

Rameshkumar³

2018

Mat. Res.

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“…In the presence of the inhibitor, the metal surface is positively charged with respect to PZC [27][28][29], hence chloride ions will first get adsorbed in the metal surface after that the protonated inhibitor molecules will be adsorbed and the metal ion dissolution will be effectively protected [30]. In the uninhibited HCl solution, the mechanism of anodic dissolution involves the reversible adsorption of the anion Cl -on steel surface, release of electrons from the anions adsorbed onto the metal surface and desorption of adsorbed species with Fe +2 ions after picking up elec- trons from the steel surface [27,29].…”

Section: Potential Of Zero Chargementioning

confidence: 99%

Impedance Spectroscopy Studies on Corrosion Inhibition Behavior of Synthesized N,N’-bis(2,4-dihydroxyhydroxybenzaldehyde)-1,3-Propandiimine for API-5L-X65 Steel in HCl Solution

Danaee

Bahramipanah

Moradi

et al. 2016

Journal of Electrochemical Science and Technology

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The inhibition ability of N,N-bis(2,4-dihydroxyhydroxybenzaldehyde)-1,3-Propandiimine (DHBP) as a schiff base against the corrosion of API-5L-X65 steel in 1 M HCl solution was evaluated by electrochemical impedance spectroscopy, potentiodynamic polarization and scanning electron microscopy. Electrochemical impedance studies indicated that DHBP inhibited corrosion by blocking the active corrosion sites. The inhibition efficiency increased with increasing inhibitor concentrations. EIS data was analysed to equivalent circuit model and showed that the charge transfer resistance of steel increased with increasing inhibitor concentration whilst the double layer capacitance decreased. The adsorption of this compound obeyed the Langmuir adsorption isotherm. Gibbs free energy of adsorption was calculated and indicated that adsorption occurred through physical and spontaneous process. The corrosion inhibition mechanism was studied by potential of zero charge. Polarization studies indicated that DHBP retards both the cathodic and anodic reactions through adsorption on steel surface. Scanning electron microscopy was used to study the steel surface with and without inhibitor.

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Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study

et al. 2020

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Effects of using a synthesized aminothiazole (BZ) Schiff base at different concentrations with and without the addition of 1 mM of KI on the corrosion mitigation of mild steel (MS) in 0.5 M sulphuric acid (H 2 SO 4) solutions are studied electrochemically using direct and alternating currents (DC and AC) techniques. Besides, the adsorption and thermodynamic parameters are calculated in a temperature range of 293-323 K. Furthermore, Mott-Schottky analysis is used to study the type of oxide layer on the MS surface. Quantum chemical calculations and Monte Carlo simulation techniques are used, and both confirmed the experimental results.

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Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media

Cited by 126 publications

References 33 publications

Colocid Dye - A Potential Corrosion Inhibitor for the Corrosion of Mild Steel in Acid Media

Colocid Dye - A Potential Corrosion Inhibitor for the Corrosion of Mild Steel in Acid Media

Impedance Spectroscopy Studies on Corrosion Inhibition Behavior of Synthesized N,N’-bis(2,4-dihydroxyhydroxybenzaldehyde)-1,3-Propandiimine for API-5L-X65 Steel in HCl Solution

Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study

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