Journal
CORROSION SCIENCE
Volume 130, Issue -, Pages 1-11Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.10.023
Keywords
Carbon steel; SEM; Weight loss; Microbiological corrosion; Pitting corrosion
Funding
- National University of Singapore [WBS R284-000-126-592]
- Lloyd's Register Global Technology Centre Singapore [WBS R284-000-126-592]
- National Natural Science Foundation of China [U1660118]
- National Basic Research Program of China (973 Program) [2014CB643300]
- National Environmental Corrosion Platform (NECP)
- Singapore Economic Development Board [WBS R284-000-126-592]
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The role of biogenic H2S in the microbiologically influenced corrosion (MIC) of carbon steel was investigated. Desulfovibrio vulgaris (ATCC 7757), a sulfate reducing bacterium, was tested against C1018 carbon steel in anaerobic vials with three different sizes, each filled with 40 mL of ATCC 1249 culture medium, providing headspace volumes of 10 mL, 85 mL and 160 mL, respectively for H2S to escape. Results showed that a larger headspace led to a lower H2S concentration in the culture medium, and this increased the sessile cell count and made the iron sulfide film thinner, resulting in increased MIC.
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