Microbiologically influenced corrosion of a pipeline in a petrochemical plant

Mahdi Kiani Khouzani, Abbas Bahrami, Afrouzossadat Hosseini-Abari, Meysam Khandouzi, Peyman Taheri

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
65 Downloads (Pure)

Abstract

This paper investigates a severe microbiologically influenced failure in the elbows of a buried amine pipeline in a petrochemical plant. Pipelines can experience di_erent 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 Di_raction (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.

Original languageEnglish
Article number459
Number of pages14
JournalMetals
Volume9
Issue number4
DOIs
Publication statusPublished - 2019

Keywords

  • Amine pipeline
  • Failure
  • Microbiologically influenced corrosion (MIC)
  • Sulfate-reducing bacteria (SRB)

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