Effect of cysteine on the anodic dissolution of copper in sulfuric acid medium

Matos, Jaqueline Borges; Pereira, Luiza Penna dos Santos; Agostinho, Sílvia Maria Leite; Barcia, Oswaldo E.; Cordeiro, G.G.O.; D’Elia, Eliane

doi:10.1016/j.jelechem.2004.03.020

Cited by 123 publications

(43 citation statements)

References 18 publications

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“…The interaction of these compounds with metal surfaces may occur via either the amino or carboxylate groups, depending on the conditions of interaction and the substrate 6 . In an electrodeposition process, amino acids can act as ligands for metallic ions; they can also enhance or decrease the intensity of parallel reactions (for example, the hydrogen evolution reaction, HER) 7,8 . The side chain of the amino acid can also play an important role.…”

Section: Introductionmentioning

confidence: 99%

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

et al. 2012

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In the present work, cysteine and allyl alcohol were added to citrate baths as additives to Cu-Zn coatings on steel substrates. In order to verify the effects of the deposition parameters (current density, mechanical stirring speed, and additives) on the coating composition, electrochemical behavior, morphology, and microstructure properties of Cu-Zn coatings, the electrodeposition of the alloy was carried out using an experimental composite design 2 3 , in which these parameters were considered the entry variables and the measured properties were the response variables. The confidence level was 95% and the results were shown as response surface diagrams. It was possible to verify that the current density affected the zinc content in the coating, while the coating produced from cysteine-contained bath presented the worse anticorrosive performance. In a general way, it was possible to observe that the studied parameters affected the morphology, grain size, and the electrochemical behavior of these coatings, although only a few response variables were statistically influenced by them.

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Section: Introductionmentioning

confidence: 99%

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

et al. 2012

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“…These properties would justify their use as corrosion inhibitors. J.B.Matos [2] studied the effect of cysteine (Cys) on the anodic dissolution of copper in sulfuric acid, at room temperature using electrochemical methods. Cys (HSCH 2 CHNH 2 COOH) contains three dissociable protons, and in aqueous solutions ionization depends upon pH.…”

Section: Amino Acidsmentioning

confidence: 99%

“…The possibility of the copper corrosion prevention has attracted many researchers so until now numerous possible inhibitors have been investigated. Amongst them there are inorganic inhibitors [1], but in much greater numbers there are organic compounds and their derivatives such as azoles, amines, amino acids [2,3] and many others. It is noticed that presence of heteroatoms such as nitrogen, sulphur, phosphorous in the organic compound molecule improves its action as copper corrosion inhibitor.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of 2-Mercaptobenzothiazole in Cooling Water System

Mosaferi¹,

Delijani²,

Koshky³

2012

Thermal Power Plants

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“…Most of the excellent acid inhibitors are organic compounds containing nitrogen, oxygen, phosphorus, and sulphur. Organic compounds containing electron rich functional groups, electrons in triple or conjugated double bonds, and heteroatoms such as nitrogen, sulfur, and oxygen are usually acting as good inhibitors since these compounds are easily adsorbed on metal surfaces [5][6][7][8][9][10][11][12][13]. Structure and geometry of a molecule have a definite role in preventing the corrosion of metal in acid medium.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Two Water Soluble Heterocyclic Hydrazones on Copper in Nitric Acid: Electrochemical, Surface Morphological, and Quantum Chemical Investigations

Raphael

Kakkassery

Shanmughan

et al. 2016

International Journal of Metals

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Two novel heterocyclic compounds (E)-2-(1-(pyridin-3-yl)ethylidene)hydrazinecarbothioamide (3APTSC) and (E)-3-(1-(2-phenylhydrazono)ethyl)pyridine (3APPH) derived from 1-(pyridin-3-yl)ethanone were synthesized and characterized by various spectroscopic techniques. The corrosion inhibition efficacies of these compounds on copper in 0.1 M HNO 3 were screened by electrochemical corrosion monitoring techniques such as potentiodynamic polarization studies and impedance spectroscopy. Investigations clearly established that 3APPH displayed higher corrosion inhibition efficiency on Cu than 3APTSC at all concentrations. The mechanism of inhibition was verified with the help of adsorption isotherms. 3APTSC and 3APPH obeyed Langmuir adsorption isotherm on Cu surface. Thermodynamic parameters such as adsorption equilibrium constant ( ads ) and free energy of adsorption (Δ ads ) were also evaluated. Potentiodynamic polarization investigations confirmed that the 3APTSC and 3APPH act as mixed type inhibitors. Surface analysis of the metal specimens was performed by scanning electron microscopy. Energy of HOMO and LUMO, their difference, number of electrons transferred, electronegativity, chemical hardness, and so forth were evaluated by quantum chemical studies. Agreeable correlation was observed between the results of quantum chemical calculations and other corrosion monitoring techniques.

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Effect of cysteine on the anodic dissolution of copper in sulfuric acid medium

Cited by 123 publications

References 18 publications

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

Spectrophotometric Determination of 2-Mercaptobenzothiazole in Cooling Water System

Interaction of Two Water Soluble Heterocyclic Hydrazones on Copper in Nitric Acid: Electrochemical, Surface Morphological, and Quantum Chemical Investigations

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