T&R Report R-21: Fundamentals of Cathodic Protection for Marine Service (1976)

This report at first discusses in fundamental terms the nature of galvanic corrosion, and electron flow, and then examines the behavior of dissimilar metals in a sea water-electrolyte, and of how app­lied currents can protect steel surfaces. With this background, the report then details the design, application, and maintenance of both galvanic anode systems and impressed current systems, covering types of anodes and shields, method of attachment, power supplies, and current requirements, monitoring, and precaution to be taken during docking.