PART 2
PRODUCTS
2.1
IMPRESSED CURRENT ANODES
2.1.1
Bare High Silicon Cast-Iron Anodes
Cast-iron anodes shall be of the size indicated and shall conform to the
following requirements:
2.1.1.1
Chemical Composition (Nominal)
Percent by Weight
Element
Grade 2
Silicon
14.20-14.75
1.50 Max.
Carbon
0.75-1.15
3.25-5.00
Iron
Balance
2.1.1.2
Electrical Resistivity
Seventy-two microhm-centimeter at minus 7 degrees C 20 degrees F.
2.1.1.3
Physical Properties (Nominal)
Tensile strength
103.4 MPa
Compressive strength
689.5 MPa
Brinell hardness
520
Density
7000 kilograms per cubic meter
Melting point
1260 degrees C
Coefficient of
132 nanometer per degree C
expansion from 0
to 100 degree C
Tensile strength
15,000 psi
Compressive strength
100,000 psi
Brinell hardness
520
Density
7.0 grams per cubic centimeter
Melting point
2300 degrees F
Coefficient of
0.00000733 centimeter
expansion from 32
per degree F
to 212 degrees F
2.1.2
Bare Graphite Anodes
Bare graphite anodes shall have a maximum electrical resistivity of 0.0011
ohm-centimeter.
2.1.3
Canister Contained Anodes
Canister contained anodes shall be packed at the factory in sheet metal
canisters with calcined petroleum coke breeze. The coke shall have a
resistivity of 0.1 ohm-cm tested at 1034 kPa 150 psi. The coke shall be
11244 kg/cubic meter 70 lbs/cubic foot or greater. The maximum particle
size shall be 1 mm 0.039 inches and the coke shall be dust-free. The
canisters shall be capped with tight fitting end caps secured to the body
of the canister. The canister shall provide a minimum annular space of 75
mm 3 inches all around the anode. The connecting cable shall pass through
SECTION 13112A
Page 13
Previous Page
