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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Frontiers of Materials Award Symposium: Microbiologically Influenced Corrosion - How Organisms Accelerate Materials Degradation
Presentation Title Corrosion of Stainless Steel in Deep Groundwater - Microbial and Geochemical Processes
Author(s) Pauliina Rajala, Elisa Isotahdon
On-Site Speaker (Planned) Pauliina Rajala
Abstract Scope Corrosion of two stainless steel grades, AISI304 and AIS316, was studied in long-term in-situ and laboratory experiments in conditions relevant for underground geological repository for nuclear waste. Low and intermediate level nuclear waste is produced during the operation and decommissioning of nuclear power plants. The metallic portion of this waste includes various parts made of stainless steels and carbon steel. At Olkiluoto nuclear power plant (Finland) the waste has been disposed of in a geological repository located at the depth of 60-95m below surface. General corrosion rates were moderate but localized corrosion was frequently detected. Interestingly, higher alloyed grade (AISI316) faced more intensive corrosion than lower alloyed grade in both laboratory and in-situ field conditions. Localized corrosion was pitting and intergranular corrosion. Diverse microbial community was detected on surfaces of steels in both in-situ and laboratory conditions. The microbes were accumulated on grain boundaries, where more intensive corrosion was detected.
Proceedings Inclusion? Undecided
Keywords Iron and Steel, Environmental Effects, Other


Corrosion in Fire Protection Systems (FPS) and the Role of Microbiologically Influenced Corrosion (MIC)
Corrosion of Stainless Steel in Deep Groundwater - Microbial and Geochemical Processes
Cross-disciplinary Dialog Essential for Overcoming Challenges to Managing Microbiologically Influenced Corrosion (MIC)
Deciphering the Corrosion Potential of Methanogen-induced Microbiologically Influenced Corrosion Using an Integrative Approach
Methanogen Induced Microbiologically Influenced Corrosion (Mi-MIC): Environmental Condition and Parameter Have a High Impact on the Corrosion Rate and Products
Microbial Communities and Corrosion Across Oil and Gas Systems – Similarities and Differences
Using Polyoxometalate Materials as Multifunctional Coatings with Antimicrobial and Anticorrosive Properties

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