Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Research Paper
Iron Corrosion by Methane Producing Archaea (MPA) and Sulfate Reducing Bacteria (SRB) Utilizing Metallic Iron as an Electron Donor
Kimio ItoSatoshi WakaiHirohito TsurumaruTakao IinoKoji MoriTaku UchiyamaOsamu MikiShigeaki Harayama
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JOURNALS FREE ACCESS

2011 Volume 60 Issue 9 Pages 402-410

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Abstract

Methane Producing Archaea (MPA), which could utilize metallic iron as an electron donor and CO2 as an electron acceptor and a carbon source, corroded an iron coupon severely in seawater medium under anaerobic condition (N2(80%)+CO2(20%)). Main component of corrosion products by MPA was FeCO3. MPA corroded the iron coupon more severely when they coexisted with SRB which could also utilize metallic iron as an electron donor. Corrosion rate of the iron coupon by MPA+SRB was about 2.3 times higher than that by MPA only under anaerobic condition (N2(80%)+CO2(20%)). Main component of corrosion products by MPA+SRB was FeCO3 like that by MPA.
Corrosion rates of the iron coupon by MPA only, or MPA+SRB under anaerobic condition (N2(80%)+CO2(20%)) were higher than those under aerobic condition (Air) after the anaerobic corrosion experiments.
Therefore, corrosive effects on iron by MPA+SRB, which can utilize metallic iron as an electron donor, should be considered as cause of microbiologically influenced corrosion in the anaerobic corrosive environments like oil fields, where CO2 and Cl are available.

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© 2011 Japan Society of Corrosion Engineering
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