Monitoring copper corrosion in bentonite by means of a coupled multi-electrode array

Kosec, Tadeja; Hren, Miha; Legat, Andraž

doi:10.1080/1478422x.2017.1312200

Cited by 10 publications

(8 citation statements)

References 24 publications

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“…[16] A coupled multielectrode array (CMEA) was also used to monitor the spatio-temporal distribution of currents in bentonite slurry, where the consumption of O 2 was reflected by the detection of smaller currents. [17] The use of multielectrode arrays using a multichannel microelectrode analyzer has also been demonstrated for copper pitting probability studies in chloride media. [18] From the current state-of-the-art review presented here, and the majority of recent research, [19,20] it is clear that several issues remain unanswered.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the galvanic corrosion of copper–steel coupling in bentonite slurry during the early oxic phase using coupled multielectrode arrays

Kosec

Hren

Prijatelj

et al. 2023

Materials & Corrosion

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In the case of a two‐part container for spent nuclear fuel, consisting of an iron‐based inner structure with a copper coating, the potential perforation of copper through minor damage may result in intensive galvanic corrosion between copper and steel. The present work focuses on the corrosion of steel galvanically coupled to copper and exposed to a slightly saline environment under oxic conditions. The electrochemical processes on individual electrodes were monitored by coupled multielectrode arrays (CMEAs). The CMEAs were either in contact with groundwater saturated with bentonite or immersed in groundwater only. Very high galvanic corrosion currents were detected between carbon steel and pure copper in the early oxic phase. Additionally, the use of CMEAs further made it possible to monitor the distribution of cathodic currents around the steel electrode, which behaved anodically. Various microscopy and spectroscopy techniques were applied to identify the modes of corrosion and the type of corrosion products present at the end of the period of exposure.

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Section: Introductionmentioning

confidence: 99%

Monitoring the galvanic corrosion of copper–steel coupling in bentonite slurry during the early oxic phase using coupled multielectrode arrays

Kosec

Hren

Prijatelj

et al. 2023

Materials & Corrosion

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“…Electrochemical impedance spectroscopy (EIS) measurements have also been performed during long-term exposure of copper to bentonite, with ER probes serving as working electrodes for the EIS [21]. Another possible method is measuring the spatio-temporal distribution of currents using coupled multi-electrode array (CMEA) sensors [22,23]. Copper CMEAs have been used in studies investigating copper pitting in drinking water, and for the long-term monitoring of copper exposed to bentonite in an oxic environment [24,23].…”

Section: Introductionmentioning

confidence: 99%

“…Another possible method is measuring the spatio-temporal distribution of currents using coupled multi-electrode array (CMEA) sensors [22,23]. Copper CMEAs have been used in studies investigating copper pitting in drinking water, and for the long-term monitoring of copper exposed to bentonite in an oxic environment [24,23].…”

Section: Introductionmentioning

confidence: 99%

Effect of the microstructural properties of copper on corrosion performance

Kosec

Voglar

Močnik

et al. 2021

Corrosion Engineering, Science and Technology

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The aim of the study was to define the influence of microstructural properties on the electrochemical properties of copper in four different forms: copper in sheet form, copper doped with phosphorus, electroplated copper and copper wire. Open circuit potential and polarization resistance measurements were carried out in order to determine the electrochemical properties and corrosion rates of copper in 0.1 M NaCl solution in oxic conditions at ambient temperature. Statistical evaluation of the electrochemical data was performed in order to differentiate between the various forms of copper samples. Microstructural and electrochemical investigations were combined with electron microscopy and Raman analysis of the corrosion products after immersion of the copper samples in a 0.1 M NaCl solution for 30 days. The various morphologies of copper corrosion products were identified and analyzed by Raman spectroscopy for the various forms of copper.

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“…A CMEA allows measurements of partial corrosion currents, and therefore the monitoring of the corrosion pattern and the rate over time are possible [36]. Despite the wide-ranging capabilities of this technique, due to the complexity of the measuring setup, a CMEA has only been used a few times for corrosion in porous materials such as concrete [28,30] and bentonite [37]. A specific problem in measuring and interpreting steel corrosion in concrete is the fairly large interval of dimensions, which are involved in corrosion processes.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Corrosion of Steel in Concrete Exposed to a Marine Environment

2020

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Reinforced concrete structures require continuous monitoring and maintenance to prevent corrosion of the carbon steel reinforcement. In this work, concrete columns with carbon and stainless steel reinforcements were exposed to a real marine environment. In order to monitor the corrosion processes, two types of corrosion probes were embedded in these columns at different height levels. The results from the monitoring of the probes were compared to the actual corrosion damage in the different exposure zones. Electrical resistance (ER) probes and coupled multi-electrodes (CMEs) were shown to be promising methods for long-term corrosion monitoring in concrete. Correlations between the different exposure zones and the corrosion processes of the steel in the concrete were found. Macrocell corrosion properties and the distribution of the separated anodic/cathodic places on the steel in chloride-contaminated concrete were addressed as two of the key issues for understanding the corrosion mechanisms in such environments. The specific advantages and limitations of the tested measuring techniques for long-term corrosion monitoring were also indicated. The results of the measurements and the corrosion damage evaluation clearly confirmed that the tested stainless steels (AISI 304 and AISI 304L) in a chloride-contaminated environment behave significantly better than ordinary carbon steel, with corrosion rates from 110× to 9500× lower in the most severe (tidal) exposure conditions.

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Monitoring copper corrosion in bentonite by means of a coupled multi-electrode array

Cited by 10 publications

References 24 publications

Monitoring the galvanic corrosion of copper–steel coupling in bentonite slurry during the early oxic phase using coupled multielectrode arrays

Monitoring the galvanic corrosion of copper–steel coupling in bentonite slurry during the early oxic phase using coupled multielectrode arrays

Effect of the microstructural properties of copper on corrosion performance

Monitoring the Corrosion of Steel in Concrete Exposed to a Marine Environment

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