Cathodic Protection of Steel in Concrete

Update: 2025-11-29

Description

A comprehensive guide to methods for combating corrosion in reinforced concrete structures, primarily focusing on deterioration induced by chloride ingress and carbonation. It thoroughly reviews the principles, application, and economics of Cathodic Protection (CP) as an electrochemical repair strategy, emphasizing its benefits over costly conventional repairs for contaminated structures. Detailed technical information is provided on the design and operation of CP systems, outlining various anode types (e.g., surface coatings, embedded meshes), power supplies, and necessary installation procedures, such as pre-treatment and reinforcement continuity checks. A significant portion of the text is dedicated to the complex electrical criteria for monitoring CP effectiveness, acknowledging the challenges presented by the inherent variability and high resistivity of concrete. Furthermore, the document explores related temporary electrochemical treatments like realkalization and desalination, comparing their processes and potential side effects. Ultimately, the text establishes CP as a vital solution for extending the service life of structures, exemplified by a case study concerning the installation on the cooling towers at Palo Verde Power Station.

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