Which of the following materials is/are used as backfill around the anode in impressed currents?(a) Coke breeze(b) Gypsum(c) Bentonite(d) Coke breeze, gypsum, and bentoniteThis question was addressed to me at a job interview.I'm obligated to ask this question of Cathodic and Anodic Protection in portion Corrosion Prevention of Corrosion Engineering

Which of the following materials is/are used as backfill around the an

1.	Which of the following materials is/are used as backfill around the anode in impressed currents?(a) Coke breeze(b) Gypsum(c) Bentonite(d) Coke breeze, gypsum, and bentoniteThis question was addressed to me at a job interview.I'm obligated to ask this question of Cathodic and Anodic Protection in portion Corrosion Prevention of Corrosion Engineering
Answer» Correct choice is (d) Coke BREEZE, gypsum, and bentonite The explanation is: Coke breeze, gypsum, and bentonite are the materials that are used as backfill material AROUND the anode. These materials improve the ELECTRIC CONTACT between the anode and surrounding soil.

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