Quantifying sulfate reducing bacteria in microbiologically influenced corrosion. (Reannouncement with new availability information). Final report

Technical Report · Sun Nov 01 04:00:00 EST 1992

OSTI ID:200633

Little, B; Wagner, P

Iron-oxidizing, sulfur-oxidizing, iron-reducing, sulfate-reducing, acid producing, slime-producing, ammonium-producing, and hydrogen-producing bacteria in addition to other physiological groups have been implicated in the corrosion of metals and alloys. However, the most widely recognized and most easily detected bacteria in most corrosion processes are the bacteria that reduce sulfate to sulfide that are collectively called sulfate-reducing bacteria (SRB). SRB constitute a physiological-ecological assemblage of morphologically very different types of anaerobic bacteria that have in common the capacity to reduce sulfate to hydrogen sulfide in dissimilatory energy-conserving reactions. Hydrogen sulfide can react with metals to produce metal sulfides as corrosion products. Most techniques for the evaluation of SRB populations are related to their potential to cause microbiologically influenced corrosion (MIC). Standard practices for evaluating the contribution of SRB to corrosion processes depend on the detection and quantification of SRB using culturing techniques that enumerate organisms or quantify intrinsic characteristics of SRB including enzymes and antibodies. Mineralogy of metal sulfides and sulfur isotope fractionation can also be used to verify the involvement of SRB in corrosion. This paper will review standard practices and innovative techniques for detecting and quantifying SRB.

• Research Organization: Naval Research Lab., Monterey, CA (United States)
• OSTI ID: 200633
• Report Number(s): AD-A--266604/8/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
ANAEROBIC CONDITIONS
BIODEGRADATION
BIOLOGICAL FOULING
CORROSION
ELECTROCHEMISTRY
METALS
MICROORGANISMS
SULFATE-REDUCING BACTERIA