Biocorrosion of AISI 304 Stainless Steel by Desulfovibrio desulfuricans in Seawater

The corrosion behavior of AISI 304 stainless steel (SS304) in a batch system of enriched artificial seawater (EASW) in the presence of a sulfate-reducing bacteria (SRB) species (Desulfovibrio desulfuricans ATCC 27774) was investigated using analytical techniques including electrochemical impedance s...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2008-07, Vol.47 (14), p.4703-4711
Main Authors: Nguyen, Thi My Phuc, Sheng, Xiaoxia, Ting, Yen-Peng, Pehkonen, Simo Olavi
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Desulfovibrio desulfuricans
Exact sciences and technology
Materials and Interfaces
Natural water pollution
Pollution
Seawaters, estuaries
Water treatment and pollution
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Summary:The corrosion behavior of AISI 304 stainless steel (SS304) in a batch system of enriched artificial seawater (EASW) in the presence of a sulfate-reducing bacteria (SRB) species (Desulfovibrio desulfuricans ATCC 27774) was investigated using analytical techniques including electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). EIS analysis showed that the polarization resistance of SS304 decreased after immersion in EASW in the presence of the SRB for 14 days compared to the control sample (in the absence of SRB). The corrosion processes were simulated using equivalent circuit models, which provided electrochemical information on the liquid/surface interface for both abiotic and biotic systems. Using AFM, pits and cracks were observed on the stainless steel surface in the presence of SRB, and a thick biofilm produced by SRB was evident in SEM micrographs, which corroborated the EIS results for the explanation of the biocorrosion mechanism. XPS analysis showed changes in the chemical states at the near-surface environment and on the surface of stainless steel.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie071468e