Involvement of organic acid during corrosion of iron coupon Desulfovibrio desulfuricans SCIE SCOPUS KCI

Cited 13 time in WEB OF SCIENCE Cited 13 time in Scopus
Title
Involvement of organic acid during corrosion of iron coupon Desulfovibrio desulfuricans
Author(s)
Pak, KR; Lee, HJ; Lee, HK; Kim, YK; Oh, YS; Choi, SC
Publication Year
2003-12
Abstract
Microbiologically influenced corrosion (MIC) is an electrochemical process where the participation of microorganisms initiates, facilitates, or accelerates the corrosion reaction. Sulfate-reducing bacteria (SRB) reduce sulfate to sulfide and are known to be the most destructive microorganisms in anaerobic MIC. Accordingly, the current study attempted to elucidate the mechanisms involved and the relative importance of the corrosive products in SRB-induced corrosion. The measured rate of anaerobic corrosion of iron coupons by Desulfovibrio desulfuricans was 89.9 mug cm(-2) d(-1). Direct contact between the cells and the iron coupon did not seem to be necessary for corrosion to occur, since the corrosion rate was similar (100.8 mug cm(-2) d(-1)) when the coupon was enclosed in a dialysis bag. The participation of sulfide in the corrosion process was, only,marginal, as the specific corrosion rate was 2.5 times higher in a sulfate-free pyruvate medium than in an H2S-producing lactate medium. Acetate (18.8-22.1 mM), the end-product of pyruvate and lactate metabolism, was identified in the culture medium and thus presumed to play a major role in the corrosion process involving Desulfovibrio desulfuricans.
ISSN
1017-7825
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5428
Bibliographic Citation
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.13, no.6, pp.937 - 941, 2003
Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
Subject
STEEL CORROSION; BACTERIA
Keywords
acetate; biofilm; corrosion; Desulfovibrio; organic acid
Type
Article
Language
English
Document Type
Article
Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
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