Corrosion behavior of copper alloys in chloride media

Alfantazi, Akram; Ahmed, Tawfik M.; Tromans, Desmond

doi:10.1016/j.matdes.2008.10.015

Cited by 173 publications

(86 citation statements)

References 16 publications

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“…The Eh and pH of the product water ( Figures C1-C17) indicate that the Cu 0 is held outside the passivation range for much of the reaction time, with the dominant precipitated products (in saline water) likely to be CuO and Cu2O [19,[232][233][234]. …”

Section: Appendix F Summary Of the Interaction Between Fe Corrosionmentioning

confidence: 99%

Desalination of Water Using ZVI (Fe0)

Antia¹

2015

Water

196

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Batch treatment of water (0.2 to 240 L) using Fe 0 (44,000-77,000 nm) in a diffusion environment operated (at −8 to 25 °C) using: (a) no external energy; (b) pressurized (<0.1 MPa) air; (c) pressurized (<0.1 MPa) acidic gas (CO2); (d) pressurized (<0.1 MPa) anoxic gas (N2); (e) pressurized (<0.1 MPa) anoxic, acidic, reducing gas (H2 + CO + CO2 + CH4 + N2), reduces the salinity of water. Desalination costs increase with increasing NaCl removal. The cost of reducing water salinity from: (i) 2.65 to 1.55 g·L . Desalination is accompanied by the removal, from the water, of one or more of: nitrate, chloride, fluoride, sulphate, phosphate, As, B, Ba, Ca, Cd, Co, Cu, Fe, Mg, Mn, Na, Ni, P, S, Si, Sr, Zn. The rate of desalination is enhanced by increasing temperatures and increasing HCO3 − /CO3 2− concentrations. The rate of desalination decreases with increasing SO4 2− removal under acidic, or pH neutral, operating conditions.

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Section: Appendix F Summary Of the Interaction Between Fe Corrosionmentioning

confidence: 99%

Desalination of Water Using ZVI (Fe0)

Antia¹

2015

Water

196

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“…e potentiodynamic polarization curves for Cu-Ni (90/10) alloy in synthetic seawater in the potential range from −0.7 to +0.7 V versus Ag/AgCl are given in Figure 7 and the corrosion parameters are tabulated in curves show three distinct regions, namely, Tafel region at lower overpotentials extending to the peak current density due to the dissolution of copper to Cu + ions, a region of decreasing current density until a minimum ( min ) is reached due to the formation of CuCl, and a region of the sudden increase in current density leading to a limiting value ( lim ), due to the formation of CuCl 2 − . ese three regions have been reported in the literature in the polarization curves of copper in 3.5% sodium chloride solution [34] and also in the case of Cu-Ni (90/10) alloy [35]. With the increase in immersion period from 1 to 48 h, the corrosion potential ( corr ) is shied towards more negative value and the shi in cathodic Tafel slope ( ) is greater than the shi in anodic slope ( ).…”

Section: Potentiodynamic Polarizationmentioning

confidence: 75%

Corrosion Inhibition of Cu-Ni (90/10) Alloy in Seawater and Sulphide-Polluted Seawater Environments by 1,2,3-Benzotriazole

Boyapati

Kanukula

2013

ISRN Corrosion

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e inhibiting effect of 1,2,3-benzotriazole (BTAH) against the corrosion of Cu-Ni (90/10) alloy in seawater and seawater polluted with inorganic sulphide was studied by electrochemical impedance studies (EISs), potentiodynamic polarization studies, and cyclic voltammetric (CV) and weight-loss studies. Surface examination studies were carried out by X-ray photo electron spectroscopy (XPS) and scanning electron microscopy (SEM)/energy dispersive X-ray analysis (EDX). EIS studies have been carried out in seawater and 10 ppm of inorganic sulphide containing seawater in the absence and presence of BTAH at different concentrations, different immersion periods, and at different temperatures. Appropriate equivalent circuit model was used to calculate the impedance parameters. e potentiodynamic polarization studies inferred that BTAH functions as a mixed inhibitor. e impedance, polarization, and weight-loss studies showed that the inhibition efficiency of BTAH is in the range between 99.97 and 99.30% under different conditions. Cyclic voltammeric studies show the stability of the protective BTAH �lm even at anodic potentials of +550 mV versus Ag/AgCl. All these studies infer that BTAH functions as an excellent inhibitor for Cu-Ni (90/10) alloy in seawater and sulphide-polluted seawater. XPS and SEM-EDX studies con�rm the presence of protective BTAH �lm on the alloy surface.

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“…Also, Dealloying is believed to be greatly dependent on the difference between the standard reversible potentials of major constituent elements, atomic percent composition, and on the kinetics of the solid-state diffusion of the alloyed elements. Dealloying of Cu alloys containing Al and Zn occurs in neutral to lower pH solutions as a result of selective dissolution of Zn and Al, respectively [37]. For dealloying in NaCl, the generally held view is that Cu-Al solid solution is less susceptible to dealloying than Cu-Zn solid solutions [38].…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

Electrochemical Stability of Cu–10Al–10Zn, Cu–10Al–10Ni, and Cu–10Ni–10Zn Ternary Alloys in Simulated Physiological Solutions

Nady

El-Rabiei

2016

J Bio Tribo Corros

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Copper-based alloys are widely used in the consumer electronics industry for components such as connector contacts, shielding gaskets, and terminals. Nickel silver is a general term for alloys that contain copper, nickel, and zinc. Nickel silver first became popular as a base metal for silver-plated cutlery and other silverware, notably electro-plated nickel silver, jewelery and coins. In this article, the electrochemical stability of Cu10Ni-10Zn alloy was compared with that of pure copper and two of copper ternary alloys, namely Cu-10Al-10Zn and Cu-10Al-10Ni in synthetic sweat solution, Hank's solution and in Ringer physiological solution. Corrosion behavior of the different electrodes was investigated using cyclic voltammetry, potentiodynamic polarization, and impedance spectroscopy techniques. The CVs showed peaks concerning the redox reactions for copper. These peaks were assigned to the formation and reduction of copper species. Furthermore, they showed that the copper oxidation was suppressed to a large extent by the presence of Ni and zinc in the alloy composition than the presence of Al and Zn or the presence of Al and Ni elements. Also, the results showed that the Cu-10Ni-10Zn alloy exhibited good corrosion resistance due to the formation of a protective passive film. The electrochemical impedance spectroscopy results indicated that either a duplex film with an inner barrier layer and an outer porous layer or a single passive layer was formed on the surface. The formation of such passive film was discussed, and the different alloy surfaces examined by scanning electron microscopy and subjected to EDAX analysis. The surface analysis has shown the participation of the different alloying elements in the passive film according to the alloy constituents.Graphical Abstract Addition of Ni decreases the rate of corrosion of the Cu, and the Cu-10Ni-10Zn was found to be the most corrosion-resistant alloy.

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Corrosion behavior of copper alloys in chloride media

Cited by 173 publications

References 16 publications

Desalination of Water Using ZVI (Fe0)

Desalination of Water Using ZVI (Fe0)

Corrosion Inhibition of Cu-Ni (90/10) Alloy in Seawater and Sulphide-Polluted Seawater Environments by 1,2,3-Benzotriazole

Electrochemical Stability of Cu–10Al–10Zn, Cu–10Al–10Ni, and Cu–10Ni–10Zn Ternary Alloys in Simulated Physiological Solutions

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