[titanium] with [platinum] [mixed metal oxide] [_____] coating with
thickness of [_____] millimeter mils. Size and length as indicated.
][2.2
GALVANIC ANODES
2.2.1
Magnesium Anodes
[ASTM B 843] Chemical composition as follows:
CHEMICAL COMPOSITION
Aluminum
[0.01 maximum] [2.5 - 3.5] percent
[0.50 - 1.30] [0.2 minimum] percent
Zinc
[0] [0.7 - 1.3] percent
Silicon
[0] [0.05 maximum] percent
Copper
[0.02] [0.01] percent maximum
Nickel
0.001 percent maximum
Iron
[0.03] [0.002] percent maximum
Other Impurities
0.05 each or 0.30 percent maximum total
Magnesium
Remainder
a.
Bare anode weight: [4.1] [7.72] [14.53] [_____] kg [9] [17] [32]
[_____] pounds [not including core].
]2.3
ANODE LEAD WIRES
**************************************************************************
NOTE: Any pinhole, cut, scratch or other damage to
the anode cable exposing bare copper to the
electrolyte will result in early failure of the
impressed current cathodic protection system. For
this reason, special, extra heavy insulation is used
on anode cable.
**************************************************************************
No. [8] [_____] AWG, stranded copper wire conforming to ASTM B 3 and ASTM B
8. Provide wires with [2.8 mm110 mils [_____] thick, ASTM D 1248, high
molecular weight polyethylene (HMWPE) insulation] [a primary insulation of
ethylene propylene rubber and an outer jacket of chloro sulphonated
polyethylene insulation]. Wires shall be [3050] [6100] [_____] mm [10]
[20] [_____] feet in length [of sufficient length to extend to the anode
header cable [junction box] without splicing].
2.3.1
Attachment of Anode Lead Wire
Anode lead wires shall be factory installed.
2.3.1.1
End Connected Anode
[Drill] [Cast] a recess [150] [_____] mm [6] [_____] inches deep in one end
of the anode. Attach the lead wire to the anode with an anchor device.
Not more than 10 mm 1/2 inch of bare wire shall protrude from the anchor
device. Attachment shall withstand a 1446 Newton 325 pound pull without
loosening the wire or anchor device. Fill the recess with an epoxy sealing
compound [, leaving sufficient space for a plug]. [Provide non-metallic
plug flush with the anode end surface.] [Install a heat shrinkable anode
cap over the attachment, cap shall extend not less than 65 mm 2 1/2 inches
on the lead wire and 75 mm 3 inches on the anode.] Cable to anode contact
resistance shall be 0.02 ohms maximum.
SECTION 13112N
Page 10
Previous Page
