A Comparison of Biotic and Abiotic Sulphide Films on Alloy 400

Abstract

,Distribution, tenacity and chemical composition of sulphide films produced by bacteria within bioflims were compared with those produced by waterborne inorganic hides. Attempts were made to differentiate corrosion mechanisms of alloy 400 (70Ni - 30Cu) exposed to seawater in the presence of absence of sulphate-reducing bacteria (SRB). Experiments were conducted in an anaerobic environment in the presence of inorganic sulphide and sulphate-reducing bacteria (SRB) either freely corrosion of coupled to an external cathode (alloy 400) exposed air. Sulphur concentration in the films increased in the presence of SRB as well as when samples were coupled to an external cathode. Bacteria encrusted with corrosion products and integrated into the sulphide film were only observed in the presence of SRB in addition to coupling with an external cathode.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADA416844

Entities

People

  • Brenda J. Little
  • Jason S. Lee
  • Kristine Lowe
  • Richard I. Ray

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aqueous Solutions
  • Bacteria
  • Chemical Composition
  • Chemical Synthesis
  • Chemistry
  • Copper Alloys
  • Corrosion
  • Environment
  • Films
  • Government (Foreign)
  • Governments
  • Material Degradation Processes
  • Materials
  • Microorganisms
  • Organic Compounds
  • Test And Evaluation

Fields of Study

  • Biology
  • Environmental science

Readers

  • Materials Science and Engineering.