A mechanism of interaction of copper with a deoxygenated neutral aqueous solution

Bojinov, Martin; Betova, Iva; Lilja, Christina

doi:10.1016/j.corsci.2010.05.003

Cited by 36 publications

(34 citation statements)

References 50 publications

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“…Unlike other metals that are passivated and show low corrosion rates, copper alter from a state of thermodynamic immunity in the absence of oxygen, to a state of corrosion in its presence. Consequently, copper is suitable as an engineered barrier for repositories located below the water table where oxygen is absent after an initial aerobic stage, according with Bojinov et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Corrosion of High Purity Copper in Solutions Containing NaCl, Na2SO4 and NaHCO3 at Different Temperatures

Ochoa

Rodríguez

Farina

2015

Procedia Materials Science

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Oxygen free copper is one of the candidate materials for the design of high level radioactive waste containers, due to its excellent resistance to generalized and localized corrosion in aqueous electrolytes; particularly in reducing environments as the ones expected in the repository site. The aim of this work is to contribute to determine the material durability from the corrosion point of view. To this purpose the anodic behavior of copper was studied in solutions with different electrolytes of interest for being present in groundwaters that might be in contact with the containers. The research program began with the study of corrosion susceptibility in chloride solutions, one of the main aggressive species to corrosion, and continued with the study of the behavior of copper in solutions with sulfate and bicarbonate, which are also present in the groundwaters that might be in contact with the repository. The corrosion potential was monitored and anodic polarization curves were performed varying the temperature and the concentration of ions in deaerated solutions of chloride, sulfate and bicarbonate. The study was complemented with microscopic observations of the corrosive attack and compositional determinations using Energy Dispersive Microanalysis (EDS). Preliminary results showed the aggressiveness of chloride ions: the corrosion potential decreased with the ion concentration and with temperature. The current density increased both with temperature and with chloride concentration. A breakdown potential was observed under certain conditions. Corrosion products showed a composition of 30 wt% Cl and 70 wt% Cu. In sulfate containing solutions, the corrosion potential decreased with temperature but increased slightly with the ion concentration, whereas the current density increased with temperature and it was not significantly affected by the concentration. A breakdown potential was identified, which decreased with temperature and increased with sulfate concentration. In bicarbonate containing solutions, the corrosion potential decreased clearly with temperature and slightly with concentration. Different characteristics 461Maité Ochoa et al. / Procedia Materials Science 9 ( 2015 ) 460 -468 were observed in the curves: current densities were lower than in sulfate containing solutions and an anodic peak appeared under certain conditions.

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Section: Introductionmentioning

confidence: 99%

Corrosion of High Purity Copper in Solutions Containing NaCl, Na2SO4 and NaHCO3 at Different Temperatures

Ochoa

Rodríguez

Farina

2015

Procedia Materials Science

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“…This study included two vessels: one was made biotic by adding 50 ml of enrichment culture of sulfate-reducing bacteria (SRB) and the other abiotic, which was tested as such (Huttunen-Saarivirta et al 2016). Indeed, the accumulation of Cu 2 O on the copper surfaces either alone (Eriksen et al 1989;Bojinov et al 2010;Bech-Nielsen et al 2002;Trachli et al 2002;Kosec et al 2015;Sherif and Park 2005;Merkel and Pehkonen 2006) or with some CuCl (Merkel and Pehkonen 2006;Kear et al 2004) was frequently reported with another suggestion (Kosec et al 2015;Sherif and Park 2005;Merkel and Pehkonen 2006) that the formed CuCl may react more late with water to introduce Cu 2 O.…”

Section: Sem and X-ray Diffraction Analysesmentioning

confidence: 99%

Corrosion and scale studies of copper used in Moroccan industrial cooling water systems

Elhousni

Galai

ElKamraoui³

et al. 2017

Euro-Mediterr J Environ Integr

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The corrosion and scale behavior of copper in industrial cooling water system were investigated via electrochemical measurements, ionic chromatography, SEM/EDAX, and X-ray diffraction analyses. It was found that the studied water has a corrosion and scale character. The EDAX and XRD analyses indicated that the major corrosion and scale products were the CuO 2 and CaCO 3 , respectively. In addition, the middle Mueller-Hinton test was also employed to evaluate the development of microorganisms for copper in make-up water solution. It is noted that bacterial colonies appeared after immersion of samples in make-up water, indicating that this water develops bacterial colonization. Finally, the influence of some operating parameters on the corrosion and scale rate was studied. It was shown that the scale rate increases with pH, temperature, and the addition of chloride and sulfide ions. It was also found that the corrosion rate increases with temperature and chloride ions and decreases with pH and immersion time.

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“…The corrosion of Cu has been extensively studied in aerated chloride solutions [29][30][32][33][34][35] and, to a lesser degree, in anoxic aqueous solutions. 31,[36][37][38] In many of these studies nominally under anoxic conditions, there was a good probability that residual traces of dissolved O 2 were present. Cleveland, et al, however, estimated the residual dissolved [O 2 ] in their experiments to be < 6.5 ppb with the probability that it was as low as 1 ppb.…”

Section: Discussionmentioning

confidence: 99%

Corrosion of Cold Spray Deposited Copper Coating on Steel Substrates

et al. 2015

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The corrosion behavior of copper cold spray coatings on a carbon steel substrate was compared to that of commercially available wrought copper under the conditions anticipated in a nuclear waste repository. Corrosion potential and linear polarization resistance measurements were conducted over 90 d to 120 d in 3.0 mol/L NaCl under anoxic (1) and oxygenated-toanoxic (2) conditions to simulate the long (1) and short (2) term redox conditions expected in a Canadian repository. Scanning electron microscopy and x-ray diffractometry were used to observe the morphology of the corroded surface and to identify the corrosion products formed. The two specimens behaved very similarly under both sets of conditions. Negligible corrosion was observed under anoxic conditions and the formation of both Cu +1 (Cu 2 O) and Cu +2 (Cu 2 (OH) 3 Cl) phases occurred under oxygenated conditions. No evidence was observed to suggest the particle boundaries in the cold sprayed coating were preferential corrosion sites.

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A mechanism of interaction of copper with a deoxygenated neutral aqueous solution

Cited by 36 publications

References 50 publications

Corrosion of High Purity Copper in Solutions Containing NaCl, Na2SO4 and NaHCO3 at Different Temperatures

Corrosion of High Purity Copper in Solutions Containing NaCl, Na2SO4 and NaHCO3 at Different Temperatures

Corrosion and scale studies of copper used in Moroccan industrial cooling water systems

Corrosion of Cold Spray Deposited Copper Coating on Steel Substrates

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