Effect of temperature on the acidic dissolution of copper in the presence of amino acids

Gomma, G. K.; Wahdan, Mostafa H.

doi:10.1016/0254-0584(94)90191-0

Cited by 121 publications

(51 citation statements)

References 12 publications

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“…The calculated values of both parameters are given in Table 5. The positive values of heats of adsorption (Q ads ) indicate that the degree of surface coverage increased with rise in temperature again suggesting that the effectiveness of RL with rise in temperature [46][47][48][49][50].…”

Section: Effect Of Temperaturementioning

confidence: 99%

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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Background The inhibitive effect of the aqueous extract of Rothmannia longiflora (RL) on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions was investigated by weight loss measurement as well as potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Result The extract was found to efficiently inhibit the corrosion process in both environments and inhibition efficiency increased with increasing extract concentration as well as rise in temperature. Data from electrochemical measurements suggest that the extract functioned by adsorption of the organic matter on the metal/corrodent interface, inhibiting both the anodic and cathodic half reactions of the corrosion process. Conclusion The result obtained from this study clearly shows that RL functioned as a good inhibitor for the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions and the inhibiting efficiency value increased with the inhibitor concentration. The adsorption of the RL on the mild steel surface in acid solution obeyed Langmuir adsorption isotherm.

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Section: Effect Of Temperaturementioning

confidence: 99%

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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“…BTAH is absorbed on the metal surface and forms the BTA-metal complex as a protective barrier on the metal surface in various environments. The donor-acceptor reaction between the π-electrons of an inhibitor and the d-orbital of metal has a close relation with the inhibition mechanism of BTAH because the metal-N bond in the BTA-metal complex is explained by overlapping of the metal sp-hybrid atomic orbital with the N-hybridized lone-pair atomic orbital 10,11) . The understanding of the electron or the orbital structure of the inhibitor and the materials is therefore important for the interpretation of the inhibition ef ciency.…”

Section: Introductionmentioning

confidence: 99%

“…The ΔN of copper in both cases (BTAH and BTA − ) is larger than that of steel, meaning that the electron transfer from the molecule to metal is more active in the adsorption of the BTAH and BTA-Cu cases. In addition, the larger ΔN value is related to a more exothermic prediction of the molecule-surface interaction energy, ΔE 10) . As listed in Table 6, the interaction energy between the adsorption of BTAH and the complex formation for copper is much higher than that for steel.…”

Section: Quantum Analysismentioning

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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“…The mechanism of corrosion inhibition may be explained on basis of adsorption behavior [50]. Basic information on the interaction between the inhibitor and the mild steel surface can be provided by the adsorption isotherm.…”

Section: Adsorption Isotherm and Thermodynamic Parametermentioning

confidence: 99%

Dapsone: A Novel Corrosion Inhibitor for Mild Steel in Acid Media

Quraishi¹

2010

TOELECJ

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Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H 2 SO 4 by dapsone were studied by polarization resistance, Tafel polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurement. Results obtained revealed that inhibition occurs through adsorption of the drug on metal surface without modifying the mechanism of corrosion process. Potentiodynamic polarization suggested that it acts as a mixed type predominantly cathodic in HCl and predominantly anodic in H 2 SO 4 . Electrochemical impedance spectroscopy was used to investigate the mechanism of corrosion inhibition. Thermodynamic parameters such as a E ,°a H , °a S , °a ds H were calculated to investigate mechanism of inhibition. The adsorption of dapsone followed Langmuir adsorption isotherm.

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Effect of temperature on the acidic dissolution of copper in the presence of amino acids

Cited by 121 publications

References 12 publications

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

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

Dapsone: A Novel Corrosion Inhibitor for Mild Steel in Acid Media

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