Corrosion of stainless steels AISI 304 and AISI 316 induced by sulfate reducing bacteria in anoxic groundwater

Pauliina Rajala, Malin Bomberg, Elina Huttunen-Saarivirta, Leena Carpén

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

    2 Citations (Scopus)


    A laboratory system for studying the microbiological corrosion of stainless steel decommissioning waste from nuclear power plant was designed and developed. Understanding microbially induced corrosion (MIC) in deep bedrock is important for evaluating the long-term safety of radioactive waste disposal. In anoxic water, the overall corrosion rate of steel is low. Microorganisms however, may accelerate several types of corrosion. The groundwater at the radioactive waste repository depth contains up to 105 microbial cells mL-1 with considerable diversity. MIC of stainless steels AISI 304 and AISI 316 in natural anoxic groundwater containing enrichment of sulfate reducing bacteria (SRB) was studied over a one-year experimental period. Electrochemical techniques enabling real-time survey of corrosion, such as multi-electrode arrays sensors (MASS) and linear polarization resistance (LPR) were used to detect the differences in electrochemical behavior of two stainless steels. In addition, molecular biological methods were used to detect microbial biofilm formation on the stainless steel surfaces. The general corrosion rate for both studied stainless steel grades was very low, but localized corrosion was detected on AISI 316. The aim of this paper was to characterize the rate and mechanisms of corrosion in the presence of SRB. The results of this study can be used when evaluating the risks associated with MIC of metallic materials in underground storage of low and intermediate level nuclear waste. © 2017 by NACE International.
    Original languageEnglish
    Title of host publicationCorrosion Conference and Expo 2017
    PublisherNational Association of Corrosion Engineers (NACE)
    ISBN (Print)978-1-5108-4034-8
    Publication statusPublished - 1 Jan 2017
    MoE publication typeA4 Article in a conference publication
    EventCorrosion Coference and Expo 2017, Corrosion 2017 - New Orleans, United States
    Duration: 26 Mar 201730 Mar 2017

    Publication series

    SeriesNACE - International Corrosion Conference Series


    ConferenceCorrosion Coference and Expo 2017, Corrosion 2017
    Abbreviated titleCorrosion 2017
    Country/TerritoryUnited States
    CityNew Orleans


    • MIC
    • stainless steel
    • groundwater
    • deep biosphere
    • SRB


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