Investigation of coatings, applied by PVD, for the corrosion protection of materials in supercritical water

Rudi Van Nieuwenhove, Juraj Balak, Aki Toivonen, Sami Penttilä, Ulla Ehrnstén

    Research output: Contribution to conferenceConference articleScientific

    Abstract

    Plasma coatings, applied by physical vapour deposition, as well as plasma surface treatments could find interesting applications in the nuclear field, both for existing types of reactors as well as for generation IV reactors (such as the supercritical water reactor).
    A large variety of industrially available coatings exists. Among these, the following coatings (PVD) were investigated: TiAlN, CrN and ZrO2. Small coated samples (AISI 316L and Inconel 600) were exposed to supercritical water (at 650 °C, 250 bar) during about 1000 h at an oxygen content of 150 ppb.
    Whereas the performance of the TiAlN and the ZrO2 coatings was not satisfactory, the CrN coating was found to provide a stable and protective corrosion barrier.
    The CrN coated Inconel 600 base metal shows that chromium creates approximately 0.5 µm wide stable natural passivation oxide layer which protects the surface from further corrosion attack during exposure to SCW.
    Weight gain measurements on the CrN coated samples were performed as well but did not show any significant change after exposure.
    Original languageEnglish
    Number of pages12
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event6th International Symposium on Supercritical Water-Cooled Reactors ISSCWR-6 - Shenzhen, Guangdong, China
    Duration: 3 Mar 20137 Mar 2013

    Conference

    Conference6th International Symposium on Supercritical Water-Cooled Reactors ISSCWR-6
    Abbreviated titleISSCWR-6
    CountryChina
    CityShenzhen, Guangdong
    Period3/03/137/03/13

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  • Cite this

    Van Nieuwenhove, R., Balak, J., Toivonen, A., Penttilä, S., & Ehrnstén, U. (2013). Investigation of coatings, applied by PVD, for the corrosion protection of materials in supercritical water. Paper presented at 6th International Symposium on Supercritical Water-Cooled Reactors ISSCWR-6, Shenzhen, Guangdong, China.