Cathodic Protection of Pipeline Using Distributed Control System

Table 2

Range of current required for protection of 10 miles 0f 36′′ diameter pipe [1].

Effective coating resistance in ohms for one average square foot	Current required in amperes
Bare Pipe^@	500
10,000	14.91
25,000	5.964
50,000	1.491
5,00,000	0.1491
10,00,000	0.0298
Perfect coating	0.000058

@Bare pipe assumed to require a minimum of 1 mA/ft².