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Semiconducting behavior of pure copper in alkaline solutions

A. Fattah-alhosseini, M. K. Keshavarz, A. Masomi and S. Marianaji

Article (2015)

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Cite this document: Fattah-alhosseini, A., Keshavarz, M. K., Masomi, A. & Marianaji, S. (2015). Semiconducting behavior of pure copper in alkaline solutions. Egyptian Journal of Petroleum, 24(4), p. 405-409. doi:10.1016/j.ejpe.2014.09.012
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Abstract

The corrosion resistance of passive film is correlated with its semiconducting properties, which can be measured by the Mott–Schottky analysis in high frequency domain. In this study, the semiconducting behavior of passive films formed on pure copper in aqueous NaOH solutions was investigated using Mott–Schottky analysis. The polarization curves suggested that pure copper shows comparable passive behavior in NaOH solutions with different concentrations. Also, the potentiodynamic polarization curves showed corrosion current densities reduction with decrease in concentration of NaOH solutions. In Mott–Schottky analysis, no evidence of n-type semiconducting behavior was found, indicating that oxygen vacancies and copper interstitials do not have a significant population density in the passive film. Also, this analysis indicated that with the decrease of NaOH concentration in the solution, the acceptor density of passive films increases.

Uncontrolled Keywords

Copper; Mott–Schottky; Passive film; Alkaline solution

Open Access document in PolyPublie
Subjects: 3100 Physique > 3100 Physique
3100 Physique > 3101 Études atomiques et moléculaires
Department: Département de génie physique
Research Center: Non applicable
Date Deposited: 16 Aug 2021 13:13
Last Modified: 17 Aug 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4863/
Document issued by the official publisher
Journal Title: Egyptian Journal of Petroleum (vol. 24, no. 4)
Publisher: Elsevier
Official URL: https://doi.org/10.1016/j.ejpe.2014.09.012

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