Kinetics of the hydrogen evolution reaction on NiMn graphite modified electrode

Danaee, I.; Noori, Seyyed Mohammad

doi:10.1016/j.ijhydene.2011.06.106

Cited by 119 publications

(55 citation statements)

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“…In addition, these Nyquist diagrams are not perfect semicircles. The deviation of semicircles from perfect circular shape is often referred to the frequency dispersion of interfacial impedance [37][38][39][40]. This behavior is usually attributed to the inhomogeneity of the metal surface arising from surface roughness or interfacial phenomena, which is typical for solid metal electrodes [41].…”

Section: Electrochemical Resultsmentioning

confidence: 99%

Investigation of Thermodynamic Parameters for Steel Corrosion in Acidic Solution in the Presence of N,N′-Bis(phloroacetophenone)-1,2 propanediamine

2016

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N,N 0 -Bis(phloroacetophenone)-1,2-propanediamine as corrosion inhibitor for steel in hydrochloric acid has been studied using electrochemical techniques and surface techniques. Results showed that the inhibition occurs through adsorption of the inhibitor molecules on the metal surface. The inhibition efficiency was found to increase with increasing inhibitor concentration and decreased with increasing temperature. Thermodynamic parameters for adsorption and activation processes were determined. Polarization data indicated that this compound acts as the mixed-type inhibitor and the adsorption basically obeys the Langmuir adsorption isotherm. The quantum chemical calculations were performed at the density functional theory level using B3LYP functional with the 6-31G (d,p).

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Section: Electrochemical Resultsmentioning

confidence: 99%

Investigation of Thermodynamic Parameters for Steel Corrosion in Acidic Solution in the Presence of N,N′-Bis(phloroacetophenone)-1,2 propanediamine

2016

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“…A frequency sweep from 100 kHz to 10 mHz was used for EIS measurements with AC amplitude 10 mV at open circuit potential (OCP). Fitting of experimental impedance spectroscopy data to the proposed equivalent circuit was done by means of a home written least square software based on the Marquardt method for the optimization of functions and Macdonald weighting for the real and imaginary parts of the impedance 37,38 . Scanning electron microscopy (SEM, VEGA, TESCAN-LMU) equipped with energy dispersive spectroscopy (EDX) was used to characterize the surface morphology and average chemical composition of coatings.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Anti-Corrosive Properties of Cerium Oxide Conversion Coatings on Steel X52

2017

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In this study, cerium-based conversion coating was deposited on steel X52 by dip immersion method. Cerium oxide/hydroxide is an environmentally friendly conversion coating. The effects of immersion times and immersion temperatures on corrosion properties of cerium conversion coating on steel X52 were studied. Its corrosion resistance in 3.5 wt.% NaCl solution was investigated by means of electrochemical impedance spectroscopy, potentiodynamic polarization, and surface techniques. The coated samples showed a significant decrease in corrosion rate and corrosion current decreased with increasing immersion time up to 60 s. In addition, electrochemical impedance data showed that in the presence of cerium oxide conversion coatings, the charge transfer resistance of aluminum increased. The experimental results indicated that the corrosion resistance decreased with increasing the operating temperature. Surface morphology and its chemical composition were analyzed by means of scanning electron microscopy and energy dispersive spectroscopy.

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“…The deviation of semicircles from perfect circular shape is often referred to the frequency dispersion of interfacial impedance [18][19][20]. This behaviour is usually attributed to the inhomogeneity of the metal surface arising from surface roughness or interfacial phenomena [20,21], which is typical for solid metal electrodes [22]. The equivalent circuit compatible with the Nyquist diagram recorded in the presence of inhibitor is depicted in Fig.…”

Section: Inhibitor At 20±2mentioning

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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Kinetics of the hydrogen evolution reaction on NiMn graphite modified electrode

Cited by 119 publications

References 50 publications

Investigation of Thermodynamic Parameters for Steel Corrosion in Acidic Solution in the Presence of N,N′-Bis(phloroacetophenone)-1,2 propanediamine

Investigation of Thermodynamic Parameters for Steel Corrosion in Acidic Solution in the Presence of N,N′-Bis(phloroacetophenone)-1,2 propanediamine

Preparation and Anti-Corrosive Properties of Cerium Oxide Conversion Coatings on Steel X52

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

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