A Comparison of Biotic and Inorganic Sulfide Films
Abstract
Distribution, tenacity and chemical composition of sulfide films produced by bacteria within biofilms were compared with those produced by waterborne inorganic sulfides. Attempts were made to differentiate corrosion mechanisms of alloy 400(70Ni-30Cu) exposed to seawater in the presence or absence of sulfate-reducing bacteria (SRB). Experiments were conducted in an anaerobic environment in the presence of inorganic sulfide and SRB either eely corroding or coupled to an external cathode (alloy 400) exposed in aetobic media. Sulfur concentration in corrosion products increased in the presence of SRB and/or an external cathode. Bacteria encrusted with corrosion products and integrated into the sulfide film were only observed in the presence of SRB.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2003
- Accession Number
- ADA418884
Entities
People
- Brenda J. Little
- Jason S. Lee
- Richard I. Ray
Organizations
- United States Naval Research Laboratory