SYMPOSIA PAPER Published: 01 January 1994
STP12923S

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

Source

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.

Author Information

Webster, BJ
New Zealand Institute for Industrial Research and Development, Lower Hutt, New Zealand
Newman, RC
Corrosion and Protection Centre. UMIST, Manchester, United Kingdom
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Details
Developed by Committee: G01
Pages: 28–41
DOI: 10.1520/STP12923S
ISBN-EB: 978-0-8031-5284-7
ISBN-13: 978-0-8031-1892-8