Corrosion and biofouling on stainless steels in Baltic sea water environment: a cooling water pilot study

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    In power plants, a reliable operation of the cooling water circuit is of primary importance. Where natural water is used for cooling, corrosion and biofouling may pose challenges to materials integrity. The brackish water in Baltic sea is characterized by a relatively low salt content and unique microbial communities, thus the material challenges may be different from those occurring in sea water. In this study, biofouling on and corrosion behaviour of stainless steels AISI 304L (EN 1.4307), AISI 316L (EN 1.4404) and 254 SMO (EN 1.4547) were investigated in a pilot scale cooling water circuit using brackish water of Baltic sea, obtained from Tvärminne zoological station. The pilot was in operation for 8 weeks, during which open circuit potential recording (OCP) was performed. Other electrochemical methods, cyclic anodic and cathodic polarization measurements and electrochemical impedance spectroscopy (EIS) were applied before and at the end of the pilot experiment. The biofilm coverage was calculated on surfaces. In this paper the obtained results are presented and discussed.
    Original languageEnglish
    Title of host publicationBaltica X
    Subtitle of host publicationInternational Conference on Life Management and Maintenance for Power Plants
    EditorsPertti Auerkari
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages17
    ISBN (Electronic)978-951-38-8436-9, 978-951-38-8435-2
    Publication statusPublished - 2016
    MoE publication typeA4 Article in a conference publication
    EventBALTICA X - International Conference on Life Management and Maintenance for Power Plants - Cruise, Helsinki-Stockholm, Finland
    Duration: 7 Jun 20169 Jun 2016

    Publication series

    SeriesVTT Technology
    Volume261

    Conference

    ConferenceBALTICA X - International Conference on Life Management and Maintenance for Power Plants
    Abbreviated titleBaltica X
    CountryFinland
    CityHelsinki-Stockholm
    Period7/06/169/06/16

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