Electrochemical noise analysis applied to srb-induced corrosion of carbon steel

F. Huet, N. Monfort Moros, R. P. Nogueira, B. Tribollet, D. Festy

Research output: Contribution to journalConference articlepeer-review

Abstract

Corrosion of carbon steel in the presence of a sulfate-reducing bacteria biofilm was investigated by electrochemical noise (EN) measurements on a specific sensor on which localized corrosion processes had been artificially initiated by modifying the electrode surface electrochemically or mechanically. EN has been analyzed in the time domain by considering the occurrence and the peak amplitude of the potential and current transients that characterize a localized corrosion on the central disk of the sensor. These parameters have been shown to be linked to the biological activity of the biofilm. On the contrary, measurements of the fluctuations of the only corrosion potential of a single carbon steel coupon on which a biocorrosion process had been initiated did not allow detection of this localized process. This is due to the large difference in the surface areas of the corrosion site and of the coupon.

Original languageBritish English
JournalNACE - International Corrosion Conference Series
Volume2002-April
StatePublished - 2002
EventCorrosion 2002 - Denver, United States
Duration: 7 Apr 200211 Apr 2002

Keywords

  • Biocorrosion
  • Carbon steel
  • Electrochemical noise
  • Localized corrosion
  • Microbiological induced corrosion
  • Pitting corrosion
  • Sulfate-reducing bacteria

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