Corrosion behavior of low-carbon steels in Grande Ronde basalt groundwater in the presence of basalt-bentonite packing

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:6943793

Anantatmula, R P; Delegard, C H; Fish, R L

Three low-carbon steels (AISI 1006, AISI 1020, and AISI 1025) were tested at 150/sup 0/ and 250/sup 0/C in Hanford Grande Ronde Basalt groundwater (9.75) pH) under anoxic conditions (less than or equal to 0.1 mg/L oxygen in water) in packing (75 wt% basalt + 25 wt% bentonite) for 1 and 2 weeks. Testing was initially performed in air-equilibrated groundwater (oxic conditions) without packing at 150/sup 0/C. The average corrosion under anoxic conditions with packing was at least a factor of seven lower than that for oxic conditions at 150/sup 0/C. The data indicated that carbon composition apparently affects the corrosion of low-carbon steel under oxic conditions. Under anoxic conditions with packing, corrosion was independent of the carbon composition of the steel as evidenced by almost equal weight losses for all three steels at 150/sup 0/ and 250/sup 0/C. The weight loss at 250/sup 0/C was about the same as that at 150/sup 0/C due to the formation of a very adherent layer of iron-rich clay on the surface of the steel at 250/sup 0/C, reducing the rate at which corrosion proceeds. Pitting was not detected in any of the specimens. Assuming linear corrosion kinetics, extrapolation of the 2-week data to 1,000 yr resulted in approximately 12 mm penetration of the low-carbon steel in Grande Ronde Basalt groundwater under anoxic conditions with packing.

• Research Organization: Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
• DOE Contract Number: AC06-77RL01030
• OSTI ID: 6943793
• Report Number(s): RHO-BW-SA-314-P; CONF-831174-87; ON: DE84011715
• Country of Publication: United States
• Language: English

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ALLOYS
BASALT
BENTONITE
CARBON STEELS
CHEMICAL REACTIONS
CLAYS
CORROSION
CORROSIVE EFFECTS
DATA
EXPERIMENTAL DATA
GROUND WATER
HIGH TEMPERATURE
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
IGNEOUS ROCKS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PACKAGING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
ROCKS
STEELS
VOLCANIC ROCKS
WASTES
WATER