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

Essi Jäppinen, Tiina Ikäläinen, Sari Järvimäki, Timo Saario, Konsta Sipilä, Martin Bojinov (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    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.
    Original languageEnglish
    Pages (from-to)6037–6046
    Number of pages10
    JournalJournal of Materials Engineering and Performance
    Volume26
    Issue number12
    Early online date2017
    DOIs
    Publication statusPublished - 2017
    MoE publication typeA1 Journal article-refereed

    Keywords

    • carbon steel
    • corrosion mechanism
    • octadecylamine
    • pressurized water reactor
    • secondary circuit

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