A Comparison of Biotic and Abiotic Sulphide Films on Alloy 400
Conference Proceeding 6011 Jul 2003
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
Pagination or Media Count:
,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.
- Coatings, Colorants and Finishes