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Evaluation of the Operational Degradation of ESW Pipeline Welds

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Abstract:

This study presents the results of both non-destructive (radiography and computed tomography) and destructive (light optical and scanning electron microscopy) evaluations of operational degradation in welded joints of ESW (electroslag welding) pipelines. Microbiologically influenced corrosion (MIC), potentially induced by manganese-oxidizing microorganisms (MOMOs), was investigated as a plausible degradation mechanism. Extensive subsurface corrosion cavities were identified beneath the internal surface of the pipelines. The presence of MnO2 globules near these cavities supports the hypothesis of MOMO-induced corrosion.

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Periodical:

Key Engineering Materials (Volume 1046)

Pages:

35-40

DOI:

https://doi.org/10.4028/p-r2L8v8

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Online since:

March 2026

Authors:

Zuzana Vávrovcová*, Zbyněk Veselka, Jan Bajer

Keywords:

Manganese-Oxidizing Microorganisms, MIC, Microbial Corrosion, MOMO

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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References

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