MIL-HDBK-1004/10
Other Anode Types. Button anodes and platinized anodes are
10.9.4
commonly mounted directly on the structure. Their installation requires that
the anode element be electrically isolated from the structure so that the
protective current will flow through the electrolyte. Maintaining this
isolation requires that the anodes be mounted in accordance with the
manufacturer's instructions for the specific type and size of anode being
used. In addition, a high quality protection coating or plastic shield is
often required in the vicinity of a flush-mounted anode in order to insure
proper current distribution. Anodes suspended in water should never be
suspended using the cable leads but should be suspended using either chemical
resistant lines or net bags. Nylon and polypropylene are commonly used for
such applications.
Connections. All connections between the anodes and rectifier in
10.9.5
impressed current cathodic protection systems are extremely critical. The
number and location of all connections and splices should be kept to a minimum
and should be installed according to the design and not left to the discretion
of the installer. Thermo-weld connections are preferred, although mechanical
connections may be used. All of the connections in contact with the
electrolyte should be encapsulated using epoxy material.
Impressed Current Rectifier Installation. Rectifiers are usually
10.10
either pole-mounted or pad-mounted units. They should be installed according
to applicable codes and guidance applicable to all electrical. Even though
exposed wiring may be permissible, wiring in conduit is preferred to reduce
vandalism and deterioration. All rectifier installations should be equipped
with a fused switch to allow disconnection of power to the rectifier. Typical
pole mounted and pad mounted rectifier installations are shown in Figures 125
and 126.
225
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