Onset of microbial influenced corrosion (MIC) in stainless steel exposed to mixed species biofilms from equatorial seawater

Prasanna Jogdeo, Rosalie Chai, Sun Shuyang, Martin Saballus, Florentin Constancias, Sudesh L. Wijesinghe, Dominique Thierry, Daniel J. Blackwood, Diane McDougald, Scott A. Rice, Enrico Marsili

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The understanding of microbial influenced corrosion (MIC) in aerobic mixed biofilms benefits from advanced microscopy and microbial ecology characterization of biofilms. Here, the onset of MIC in stainless steel coupons was studied in both natural and artificial seawater. Rapid selection of biofilm-forming microorganisms from natural seawater was observed for field experiments. Potential ennoblement was observed only in natural seawater. A seawater derived mixed microbial consortium enriched in artificial seawater was used to characterize the effect of several parameters on MIC. The concentration of organic carbon was the major determinant of MIC, while shaking speed and polishing played minor roles. The biofilm was preferentially formed at the grain boundaries. These results outline the need for MIC onset characterization with mixed microbial consortia to predict long-term corrosion behavior of stainless steel in seawater.

Original languageEnglish
Pages (from-to)C532-C538
JournalJournal of the Electrochemical Society
Volume164
Issue number9
DOIs
Publication statusPublished - 2017
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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