Table 11-1.--Advantages and Disadvantages of Sacrificial Anodes
power provided by a regulated dc power supply to
Advantages and Disadvantages of Sacrificial
provide the current necessary to polarize the hull. The
Anodes
protective current is distributed by specially designed
inert anodes of platinum-coated tantalum. The
Table 11-1 shows the advantages and disadvantages
principal advantage of an ICCP system is its automatic
of sacrificial anodes.
control feature, which continuously monitors and
varies the current required for corrosion protection. If
IMPRESSED CURRENT CATHODIC
the system is secured, no corrosion protection is
PROTECTION SYSTEM
provided.
The impressed current cathodic protection (ICCP)
system (fig. 11-4) uses an external source of electrical
Figure 11-4.--Basic impressed current cathodic protection system.
11-6
