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Microbiologically Influenced Corrosion of a Pipeline in a Petrochemical Plant

Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan 817463441, Iran
Delft University of Technology, Department of Materials Science and Engineering, Mekelweg 2, 2628 CD Delft, The Netherlands
Author to whom correspondence should be addressed.
Metals 2019, 9(4), 459;
Received: 1 March 2019 / Revised: 13 April 2019 / Accepted: 16 April 2019 / Published: 19 April 2019
(This article belongs to the Special Issue Microbes Meet Metals)
PDF [14570 KB, uploaded 19 April 2019]
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This paper investigates a severe microbiologically influenced failure in the elbows of a buried amine pipeline in a petrochemical plant. Pipelines can experience different corrosion mechanisms, including microbiologically influenced corrosion (MIC). MIC, a form of biodeterioration initiated by microorganisms, can have a devastating impact on the reliability and lifetime of buried installations. This paper provides a systematic investigation of a severe MIC-related failure in a buried amine pipeline and includes a detailed microstructural analysis, corrosion products/biofilm analyses, and monitoring of the presence of causative microorganisms. Conclusions were drawn based on experimental data, obtained from visual observations, optical/electron microscopy, and Energy-dispersive X-ray spectroscopy (EDS)/X-Ray Diffraction (XRD) analyses. Additionally, monitoring the presence of causative microorganisms, especially sulfate-reducing bacteria which play the main role in corrosion, was performed. The results confirmed that the failure, in this case, is attributable to sulfate-reducing bacteria (SRB), which is a long-known key group of microorganisms when it comes to microbial corrosion. View Full-Text
Keywords: microbiologically influenced corrosion (MIC); sulfate-reducing bacteria (SRB); failure; amine pipeline microbiologically influenced corrosion (MIC); sulfate-reducing bacteria (SRB); failure; amine pipeline

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Kiani Khouzani, M.; Bahrami, A.; Hosseini-Abari, A.; Khandouzi, M.; Taheri, P. Microbiologically Influenced Corrosion of a Pipeline in a Petrochemical Plant. Metals 2019, 9, 459.

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