Oxygen reduction on copper in neutral NaCl solution

King, Fraser; Quinn, Michael J.; Litke, C.D.

doi:10.1016/0022-0728(94)03705-8

Cited by 119 publications

(66 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although Cl ¹ is present at higher concentration than OH ¹ , the adsorption of latter is faster than of chlorides. 22) In natural seawater, a great number of different ions affect the characteristics of the OCP dependence on the time by competition of different adsorbed species which causes the disturbance of stable equilibrium.…”

Section: Resultsmentioning

confidence: 99%

The Corrosion Behavior of an Ag43Cu37Zn20 Alloy in the Natural Seawaters

et al. 2015

View full text Add to dashboard Cite

We investigated the effects of natural seawater on the corrosion of an Ag43Cu37Zn20 alloy. The alloy was a commercial brazing filler alloy of composition (BS1845:1984 Ag5) and belongs to the class of Cd-free silver brazing alloys. The Ag-Cu-Zn system is corrosion resistant in chloride solutions has not been widely examined. In this study, the corrosion behavior of the alloy has been investigated using the open circuit potential measurements, Tafel plots and anodic potentiodynamic curves. By comparing different samples of marine water indicates that salinity is the primary influence on corrosion behavior near the open circuit potential. At higher anodic potentials, the impact of mineral composition becomes significant.

show abstract

Section: Resultsmentioning

confidence: 99%

The Corrosion Behavior of an Ag43Cu37Zn20 Alloy in the Natural Seawaters

et al. 2015

View full text Add to dashboard Cite

show abstract

“…11 is the stoichiometric number of electrons exchanged in chargetransfer step. According to the reported works [11,12], the charge-transfer controlled step for oxygen reduction is a one-electron transfer process:…”

Section: Cathodic Reaction Kinetics Under Mixed Controlmentioning

confidence: 99%

Cathodic reaction kinetics and its implication on flow-assisted corrosion of aluminum alloy in aqueous ethylene glycol solution

Liu

Cheng

2009

J Appl Electrochem

View full text Add to dashboard Cite

The cathodic reaction kinetics and anodic behavior of Al alloy 3003 in aerated ethylene glycol-water solution, under well-controlled hydrodynamic conditions, were investigated by various measurements using a rotating disk electrode (RDE). The transport and electrochemical parameters for cathodic oxygen reduction were fitted and determined. The results demonstrate that the cathodic reaction is a purely diffusion-controlled process within a certain potential region. The experimentally fitted value of diffusion coefficient of oxygen is 3.0 9 10 -8 cm 2 s -1 . The dependence of cathodic current on rotation speed was in quantitative agreement with Levich equation. At potentials more positive than the diffusion controlled region, the cathodic process was controlled by both diffusion and electrochemical kinetics. The electrochemical reaction rate constant, k 0 , was determined to be 1.1 9 10 -9 cm s -1 . There is little effect of electrode rotation on anodic behavior of Al alloy during stable pitting. However, fluid hydrodynamics play a significant role in formation of the oxide film and the Al alloy passivity. An enhanced electrode rotation would increase the masstransfer rate of solution, and thus the oxygen diffusion towards the electrode surface for reduction reaction. The generated hydroxide ions are favorable to the formation of Al oxide film on electrode surface.

show abstract

“…Large values as this one were reported before and attributed to O 2 reduction occurring on a surface which is never oxide-free. The composition of the surface layer depended on the electrode pre-treatment, the presence of oxygen as chemical oxidant and the presence of chlorides as complexing agents for Cu(I) and Cu(II) species [19][20][21].…”

Section: Cathodic Polarization Curvesmentioning

confidence: 99%

Oxygen reduction on Cu–Zn alloys

2008

View full text Add to dashboard Cite

The reduction of oxygen on brass type Cu77Z-n21Al2 in contact with 0.1 mol L -1 borax at pH 9.2 with and without chlorides was investigated and compared with the results on spectroscopic Cu. The surface film was characterized in situ by means of reflectance spectroscopy and by electrochemical impedance in the potential range negative to the open circuit potential. The main parameters associated to the kinetics of the oxygen reduction reaction were analyzed with a rotating disc electrode. The results show that within the potentials studied, a porous film was formed on brass while no significant spectral features were observed, except at -1.2 V where zinc oxo-hydroxides grow in chloride-free solutions and dissolve when chlorides are present in the system. The number of electrons exchanged for brass was close to 4 in both solutions, showing that oxygen is predominantly reduced to hydroxyl ions, with a reaction order equal to one. The residual presence of oxides on the surface results in KouteckyLevich plots with slopes dependent on the applied potential and interfere with the calculation of the Tafel slope.

show abstract

Oxygen reduction on copper in neutral NaCl solution

Cited by 119 publications

References 26 publications

The Corrosion Behavior of an Ag43Cu37Zn20 Alloy in the Natural Seawaters

The Corrosion Behavior of an Ag43Cu37Zn20 Alloy in the Natural Seawaters

Cathodic reaction kinetics and its implication on flow-assisted corrosion of aluminum alloy in aqueous ethylene glycol solution

Oxygen reduction on Cu–Zn alloys

Contact Info

Product

Resources

About