Effect of yeast extract on microbiologically influenced corrosion of X70 pipeline steel by Desulfovibrio bizertensis SY-1

[Display omitted] Microbiologically influenced corrosion (MIC) is a complicated process that happens ubiquitously and quietly in many fields. As a useful nutritional ingredient in microbial culture media, yeast extract (YE) is a routinely added in the MIC field. However, how the YE participated in M...

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Published in:Bioelectrochemistry (Amsterdam, Netherlands) Netherlands), 2024-06, Vol.157, p.108650-108650, Article 108650
Main Authors: Guan, Fang, Pei, Yingying, Duan, Jizhou, Sand, Wolfgang, Zhang, Ruiyong, Zhai, Xiaofan, Zhang, Yimeng, Hou, Baorong
Format: Article
Language:English
Subjects:
Biofilms
Corrosion
Culture Media
Desulfovibrio
Electrochemical measurements
Microbiologically influenced corrosion
Plankton - microbiology
Steel
Sulfate-reducing prokaryotes
Sulfates
Weight loss
Yeast extract
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Summary:[Display omitted] Microbiologically influenced corrosion (MIC) is a complicated process that happens ubiquitously and quietly in many fields. As a useful nutritional ingredient in microbial culture media, yeast extract (YE) is a routinely added in the MIC field. However, how the YE participated in MIC is not fully clarified. In the present work, the effect of YE on the growth of sulfate reducing prokaryotes (SRP) Desulfovibrio bizertensis SY-1 and corrosion behavior of X70 pipeline steel were studied. It was found that the weight loss of steel coupons in sterile media was doubled when YE was removed from culture media. However, in the SRP assays without YE the number of planktonic cells decreased, but the attachment of bacteria on steel surfaces was enhanced significantly. Besides, the corrosion rate of steel in SRP assays increased fourfold after removing YE from culture media. MIC was not determined for assays with planktonic SRP but only for biofilm assays. The results confirm the effect of YE on D. bizertensis SY-1 growth and also the inhibitory role of YE on MIC.
ISSN:1567-5394
1878-562X
DOI:10.1016/j.bioelechem.2024.108650