Abstract
This chapter presents a discussion of cathodic protection systems and their design. It is divided into four sections. The first section presents an introduction to corrosion fundamentals and cathodic protection (CP) principles. The second section presents the design of galvanic systems and includes ground bed design and the algorithm for overall galvanic CP system design. In the third part, the design procedure for the more commonly used impressed systems is described. The final section presents the equations describing the attenuation of electrical potential along long buried structures, such as pipelines, and current demand equations for impressed CP systems. The application of these equations is presented as a methodology to determine the numbers of ground beds and their placement for CP of pipeline systems. The major problem associated with CP systems, stray current corrosion, is also discussed.
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