Early corrosion behavior of X80 pipeline steel in a simulated soil solution containing Desulfovibrio desulfuricans
| Autor: | Yuxuan Zhang, Hongwei Liu, Hongfang Liu, Cuiying Chen, Haixian Liu, Yuxing Fan |
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| Rok vydání: | 2021 |
| Předmět: |
Surface Properties
Colony Count Microbial Biophysics chemistry.chemical_element Electrochemistry Oxygen Corrosion Soil Pitting corrosion Soil solution Desulfovibrio desulfuricans Physical and Theoretical Chemistry Sulfate-reducing bacteria Corrosion behavior Soil Microbiology Total organic carbon Sulfates General Medicine chemistry Steel Dielectric Spectroscopy Microscopy Electron Scanning Nuclear chemistry |
| Zdroj: | Bioelectrochemistry. 141:107880 |
| ISSN: | 1567-5394 |
| Popis: | Microbiologically influenced corrosion (MIC) is one of the reasons leading to the service failure of pipelines buried in the soil. The effects of sulfate-reducing bacteria (SRB) on steel corrosion without organic carbon are not clear. In this work, SRB cells were enriched in the simulated soil solution, aiming to study SRB corrosion behavior without organic carbon source using weight loss, electrochemical measurements, and surface analysis. Effects of DO on SRB corrosion were also studied. Results indicate that SRB can survive after 14 days of incubation without organic carbon source, but approximately 90% SRB have died. SRB without organic carbon source could inhibit the uniform corrosion but enhance the pitting corrosion compared with the control specimen. The corrosion rate of the control calculated from weight loss is highest with a value of (0.081 ± 0.013) mm/y. The highest localized corrosion rate of (0.306 ± 0.006) mm/y is obtained with an initial SRB count of 107 cells/mL. The presence of DO influences the steel corrosion process. Oxygen corrosion dominates for the specimens in the absence and presence of SRB with an initial count of 103 cells/mL, while SRB MIC is primary for the specimens with high SRB counts. |
| Databáze: | OpenAIRE |
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