Coke

Backfills are used in order to reduce anode to soil resistivity and to increase the active surface of anode which leads to longer life time and higher current output. Coke acts as a conductive path for transferring electrons, hence anodes consumption rate is decreased. Payesh Sanat Novin supplies coke in three different types with 80,90 and 95 percent carbon content. Requirements of coke according to IPS standard are briefly described as per table below:

Test method

Requirement

Property

Type 3

Type 2

Type 1

ISO 609 or ISO 625

95

90

80

Carbon content min. (wt%)

ISO 687

1

5

5

Moisture content (wt%)

ISO 1171

3

5

15

Ash content (max.) (wt%)

ISO 351 or ISO 334

1

5

1

Total sulphur content (max.) (wt%)

ISO 562

1

5

5

Volatile matter content (max.) (wt%)

ISO 1013 or ISO 567

1050-1200

700-1100

650-800

Bulk density (Kg/m3)

 

coke for cathodic protection

 

 

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