Corrosion of candidate container materials by Yucca Mountain bacteria

Conference · Fri Dec 10 00:00:00 EST 1999

OSTI ID:12215

Horn, J; Jones, D; Lian, T; Martin, S; Rivera, A

Several candidate container materials have been studied in modified Yucca Mountain (YM) ground water in the presence or absence of YM bacteria. YM bacteria increased corrosion rates by 5-6 fold in UNS G10200 carbon steel, and nearly 100-fold in UNS NO4400 Ni-Cu alloy. YM bacteria caused microbiologically influenced corrosion (MIC) through de-alloying or Ni-depletion of Ni-Cu alloy as evidenced by scanning electronic microscopy (SEM) and inductively coupled plasma spectroscopy (ICP) analysis. MIC rates of more corrosion-resistant alloys such as UNS NO6022 Ni-Cr- MO-W alloy, UN's NO6625 Ni-Cr-Mo alloy, and UNS S30400 stainless steel were measured below 0.05 umyr, however YM bacteria affected depletion of Cr and Fe relative to Ni in these materials. The chemical change on the metal surface caused by depletion was characterized in anodic polarization behavior. The anodic polarization behavior of depleted Ni-based alloys was similar to that of pure Ni. Key words: MIC, container materials, YM bacteria, de-alloying, Ni-depletion, Cr-depletion, polarization resistance, anodic polarization,

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Defense Programs (DP) (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 12215
• Report Number(s): UCRL-JC-132825; TRN: US0102375
• Resource Relation: Conference: NACE Annual Conference and Exposition, CORROSION/99, San Antonio, TX (US), 04/25/1999--04/30/1999; Other Information: PBD: 10 Dec 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BACTERIA
CARBON STEELS
CONTAINERS
CORROSION
GROUND WATER
STAINLESS STEEL-304
YUCCA MOUNTAIN
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE DISPOSAL
BIOLOGICAL FOULING
NICKEL BASE ALLOYS
COPPER ALLOYS
CHROMIUM ALLOYS
MOLYBDENUM ALLOYS
TUNGSTEN ALLOYS