Ground electrode backfill composition, anode bed and apparatus

Details Ground electrode backfill composition, anode bed and apparatus Ground electrode backfill composition, anode bed and apparatus

1987-09-14

1988-11-22

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

174 6, C23F 1300

Patent

active

047863889

ABSTRACT:
A low resistance non-permeable backfill especially for use in vertical anode beds for cathodic protection of subsurface metallic structures includes a mixture of carbonaceous materials, naturally occurring graphite lubricants, additives to reduce the apparent viscosity of the slurry and portland cement mixed with water and pumped as a high density fluidized suspension into the anode bed, particularly around the casing of a deep anode bed of the general type described in United States patent to Tatum U.S. Pat. No. 3,725,669.

REFERENCES:
patent: 2495466 (1950-01-01), Miller
patent: 2552208 (1951-05-01), Mudd
patent: 2553654 (1951-05-01), Heise
patent: 3725609 (1973-04-01), Tatum
patent: 3941918 (1976-03-01), Nigol et al.
patent: 3962142 (1976-06-01), Freeman et al.
patent: 4018715 (1977-04-01), Tatum
patent: 4069870 (1978-01-01), Gallus
patent: 4170532 (1974-10-01), Tatum
patent: 4255241 (1981-03-01), Kroon et al.
patent: 4525263 (1985-06-01), Parkhurst et al.
patent: 4526667 (1985-07-01), Parkhurst et al.

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