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    Producing Rapid Sulfate-Reducing Bacteria (SRB)-lnfluenced Corrosion in the Laboratory

    Published: 01 January 1994

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    Rapid corrosion influenced by sulfate-reducing bacteria (SRB) of a creviced stainless steel (Fe-15Cr-10Ni) has been produced potentiostatically at -250 mV (SCE) using specially designed media. SRB-influenced corrosion was also produced using a two-compart-ment cell where a small anode was connected through a zero resistance ammeter (ZRA) to a large-aerated cathode. By conducting potentiostatic and ZRA-coupling tests in a number of media, it was found that the corrosion process was influenced by anionic ratios, that is, the ratio of chloride-ion concentration to total-other-anion concentration.

    In addition, studies of a convection-free stainless-steel electrode in a ‘Microcell’ assembly were conducted to investigate the stability of SRB-influenced corrosion in a bulk-aerated environment. These results suggest corrosion of stainless steel could occur in an anaerobic, convection-free microenvironment with SRB activity, by using oxygen reduction as the cathodic reaction elsewhere on the material.


    sulfate-reducing bacteria (SRB), corrosion, stainless steel, mechanisms, test methods

    Author Information:

    Webster, BJ
    Research scientist, New Zealand Institute for Industrial Research and Development, Lower Hutt,

    Newman, RC
    Reader, Corrosion and Protection Centre. UMIST, Manchester,

    Committee/Subcommittee: G01.11

    DOI: 10.1520/STP12923S