Microbiologically influenced corrosion (MIC)is a challenge for different industry sectors/infrastructure. The role of methanogen-induced-MIC (Mi-MIC) is often underestimated, due to the low corrosion rates (CR) reported so far and the suspected non-conductive corrosion product (CP), siderite. Recently, we demonstrated that corrosive methanogens have a larger impact on MIC. This difference is the result that conventional Mi-MIC studies using static incubations. This type of incubation fails to provide environmentally relevant information on the CR and CP, in particularly for methanogens. To illustrate the importance of the environment on the MIC process, we established a Multiport-Flow-Column, to simulate the natural environment. We obtained ten times higher CR than previously published under static conditions.
Furthermore, we analyzed the CP with a combination of techniques (ToF-SIMS/SEM-EDS/FIB-SEM) and found that siderite is not the sole CP of Mi-MIC.
This study will expand the current understanding of MIC thus aiding the development of different mitigation strategies.