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Effect of Hydrogenase and Mixed Sulfate-Reducing Bacterial Populations on the Corrosion of Steel

By Richard D. Bryant, Wayne Jansen, Joe Boivin, Edward J. Laishley and J. William Costerton

Abstract

The importance of hydrogenase activity to corrosion of steel was assessed by using mixed populations of sulfate-reducing bacteria isolated from corroded and noncorroded oil pipelines. Biofilms which developed on the steel studs contained detectable numbers of sulfate-reducing bacteria (10(4) increasing to 10(7)/0.5 cm(2)). However, the biofilm with active hydrogenase activity (i.e., corrosion pipeline organisms), as measured by a semiquantitative commercial kit, was associated with a significantly higher corrosion rate (7.79 mm/year) relative to noncorrosive biofilm (0.48 mm/year) with 10(5) sulfate-reducing bacteria per 0.5 cm(2) but no measurable hydrogenase activity. The importance of hydrogenase and the microbial sulfate-reducing bacterial population making up the biofilm are discussed relative to biocorrosion

Topics: General Microbial Ecology
Year: 1991
OAI identifier: oai:pubmedcentral.nih.gov:183878
Provided by: PubMed Central
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