Formation of vivianite during microbiologically influenced corrosion of steels

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:47912

McNeil, M ^[1]; McKay, J ^[2]

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1. Nuclear Regulatory Commission, Washington, DC (United States)
2. Univ. of Western Ontario, London (Canada)

Exposure of carbon and HY-80 high strength low alloy (HSLA) steels to anaerobic Postgate cultures containing sulfate reducing bacteria leads to production of mackinawite, Fe{sub 9}S{sub 8} and vivianite, Fe{sub 3}(PO{sub 4}){sub 2}{center_dot}8H{sub 2}O, with minor amounts of other minerals, the vivianite being sometimes accompanied by siderite, FeCO{sub 3}. The vivianite and mackinawite persist on exposure to air or oxygenated water. Green rust is a significant alteration product on some steels. The implications of these findings are discussed in light of present and possible future nuclear waste containers.

• OSTI ID: 47912
• Report Number(s): CONF-931108--Vol.333
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
BIODEGRADATION
CONTAINERS
CORROSION
IRON ALLOYS
KINETICS
MICROORGANISMS
RADIOACTIVE WASTE DISPOSAL
SCANNING ELECTRON MICROSCOPY
STEELS
SULFATE-REDUCING BACTERIA