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Corrosion Behavior of Carbon Steel Coated with Octadecylamine in the Secondary Circuit of a Pressurized Water Reactor

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Abstract

Corrosion and particle deposition in the secondary circuits of pressurized water reactors can be mitigated by alternative water chemistries featuring film-forming amines. In the present work, the corrosion of carbon steel in secondary side water with or without octadecylamine (ODA) is studied by in situ electrochemical impedance spectroscopy, combined with weight loss/gain measurements, scanning electron microscopy and glow-discharge optical emission spectroscopy. The impedance spectra are interpreted using the mixed-conduction model to extract kinetic parameters of oxide growth and metal dissolution through it. From the experimental results, it can be concluded that ODA addition reduces the corrosion rate of both fresh and pre-oxidized carbon steel in secondary circuit significantly by slowing down both interfacial reactions and transport through the oxide layer.

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Authors and Affiliations

  1. Nuclear Safety, VTT Technical Research Centre of Finland Ltd., 02044 VTT, Espoo, Finland

    Essi Jäppinen, Tiina Ikäläinen, Timo Saario & Konsta Sipilä

  2. Fortum Ltd, Loviisa Power Plant, Loviisa, Finland

    Sari Järvimäki

  3. Department of Physical Chemistry, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria

    Martin Bojinov

Authors
  1. Essi Jäppinen
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  2. Tiina Ikäläinen
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  3. Sari Järvimäki
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  4. Timo Saario
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  5. Konsta Sipilä
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  6. Martin Bojinov
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Correspondence to Martin Bojinov.

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Jäppinen, E., Ikäläinen, T., Järvimäki, S. et al. Corrosion Behavior of Carbon Steel Coated with Octadecylamine in the Secondary Circuit of a Pressurized Water Reactor. J. of Materi Eng and Perform 26, 6037–6046 (2017). https://doi.org/10.1007/s11665-017-3035-6

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  • DOI: https://doi.org/10.1007/s11665-017-3035-6

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