Page 611 - Corrosion Engineering Principles and Practice
P. 611
574 C h a p t e r 1 3 C a t h o d i c P r o t e c t i o n 575
–2500
Pipe to soil potential (vs. CSE, mV) –1500 “On” potential
–2000
“Off” potential
–1000
–500
0
0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00
Distance
FIGURE 13.36 Over-the-line survey with cathodic protection.
FIGURE 13.37 Instrumentation to carry out a Pearson survey.
(Photo courtesy of Tinker & Rasor)
