The significance of the energy of activation for the dissolution reaction of metal in acids

Schorr, M.; Yahalom, J.

doi:10.1016/s0010-938x(72)80015-5

Cited by 133 publications

(58 citation statements)

References 5 publications

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“…The plots of E oc vs. time of AA5052 in the absence and presence of inhibitors for 1 h are given in Figure 3. For all test conditions, open circuit potential change (OCP) initially shifts fast towards a negative direction up to 200 s. However, it shows a very slow decline for the rest of the experiment time and finally attains a steady value in approximately 1 h. The slight oscillations in OCP curves revealed that destruction and formation of corrosion product layer occurred at the metal surface [24]. The gradient shows that the surfaces of metals cannot achieve true steady states.…”

Section: Ocp Measurementmentioning

confidence: 94%

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Zhao

Tang

Dang

et al. 2017

Metals

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Abstract:Two environmental friendly triazinedithiol inhibitors 6-diallylamino-1,3,5-triazine-2,4-dithiol monosodium (DAN) and 6-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) were synthesized and their corrosion inhibition for aluminum alloy in a 1 M HCl solution was studied using weight loss methods, electrochemical measurements, and scanning electron microscopy (SEM) techniques. The inhibition efficiency of both DAN and DBN improved with increases in inhibitor concentration but decreased with increases in temperature. Results from potentiodynamic polarization and EIS showed that the corrosion inhibition efficiency of DAN and DBN was excellent. The adsorption of inhibitors on the aluminum alloy surface followed Langmuir adsorption isotherms. Morphology observation revealed that the aluminum alloy was greatly protected by these triazinedithiol inhibitors. Further, density functional theory (DFT) was used to investigate the relationships between molecular structural and inhibition efficiency.

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Section: Ocp Measurementmentioning

confidence: 94%

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Zhao

Tang

Dang

et al. 2017

Metals

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“…The K value is related to the standard free energy of adsorption, ∆G 0 ads according to the following equation 41,42) :…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Electrochemical and Quantum Chemical Studies of 1, 2, 3-Benzotriazole as Inhibitor for Copper and Steel in Simulated Tap Water

Kim

2017

Mater. Trans.

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The corrosion inhibition effect of benzotriazole on copper and steel in simulated tap water was investigated by using potentiodynamic polarization, electrochemical impedance spectroscopy and a quantum chemistry analysis. The corrosion inhibition ef ciency for copper and steel was accordingly increased with an increasing of the benzotriazole concentrations. However, the electrochemical test showed a signi cant difference between the inhibition ef ciency of copper and steel. From molecular theory and the adsorption isotherm, the difference between the d-orbital structure of copper and steel affects the adsorption stability of benzotriazole on the metal surface. This postulation is well correlated with the results of the quantum chemical analysis.

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“…where h represents the surface coverage, C is the concentration of the plant extract inhibitor and K ads is the equilibrium constant of adsorption related to the free energy of adsorption DG ads by the following [25]:…”

Section: Adsorption Isothermmentioning

confidence: 99%

Mitigation of corrosion of carbon steel in acidic solutions using an aqueous extract of Tilia cordata as green corrosion inhibitor

2016

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The effectiveness of using Tilia cordata extract as a green corrosion inhibitor for carbon steel in 1 M hydrochloric acid solutions was demonstrated by employing some chemical and electrochemical techniques. The surface morphology of C-steel specimens was examined. The results showed that Tilia cordata has corrosion inhibition characteristics with efficiency of 96% as the concentration of Tilia cordata extract increased to 300 mg L -1 . Charge transfer resistance (R ct ) value increases while both the capacitance of the double layer (C dl ) and corrosion current (i corr ) values decrease with increasing the extract concentration. The effect of temperature was studied in the range 30-60°C. Some thermodynamic parameters were calculated and discussed. The adsorption of extract on the C-steel surface was found to obey Langmuir adsorption isotherm. Polarization results showed that the investigated extract acts as mixed type inhibitor. All the different used techniques gave similar results.

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The significance of the energy of activation for the dissolution reaction of metal in acids

Cited by 133 publications

References 5 publications

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Electrochemical and Quantum Chemical Studies of 1, 2, 3-Benzotriazole as Inhibitor for Copper and Steel in Simulated Tap Water

Mitigation of corrosion of carbon steel in acidic solutions using an aqueous extract of Tilia cordata as green corrosion inhibitor

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