Effect of a Mixed Anaerobic Bacterial Consortium with SRB on the Microbial Corrosion of API 5L X65 Steel

Tüccar T., Sungur E., Cansever N.

EUROCORR2022, Berlin, Almanya, 28 Ağustos - 01 Ekim 2022, ss.1-6

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Berlin
  • Basıldığı Ülke: Almanya
  • Sayfa Sayıları: ss.1-6
  • İstanbul Üniversitesi Adresli: Evet

Özet

Microbial corrosion leading to pipeline damages in the oil industry occurs mostly as a result of the

activity of sulfate-reducing bacteria (SRB) within biofilm on the pipeline steel surface. However, SRB

are not alone in biofilms in the nature. Therefore, the consortium of anaerobic bacteria in association

with SRB in the biofilm may have a role in the corrosion process induced by SRB. To investigate this

aspect, a mixed anaerobic bacterial consortium consisting of SRB and fermentative bacteria obtained

from an oil field was used in corrosion tests of API 5L X65 steel. The experiments were carried out

under anaerobic conditions in lab-scaled systems over 50 days. The corrosion rate was detected by the

weight loss measurement method. The weight loss of API 5L X65 test coupons in the enrichment culture

increased with time and the test coupons showed significantly higher corrosion rates than the control

ones. The corrosion analysis results indicated that the enrichment culture of the mixed bacterial

consortium led to corrosion of API 5L X65 steel.