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What is the Principle of Cathodic Protection for Steel in Buried or Immersed Concrete Structures? Cathodic protection for steel in buried or immersed concrete follows the same basic principles as for atmospherically exposed concrete. The principle difference is that the concrete is likely to become water saturated, which will result in reduction in oxygen content at the steel surface under normal exposure conditions, which will be accelerated under the application of cathodic protection. Where oxygen depletion occurs, the potential

Principles of Cathodic Protection and Its Application to Steel in Concrete Steel in concrete is usually protected against corrosion by passivation of the steel arising from the high alkalinity of the pore solutions within the concrete. A stable oxide layer is formed on the steel surface which prevents the anodic dissolution of iron. The necessity for additional protective measures arises if this stable oxide layer is rendered unstable (if depassivation occurs) due to the ingress of chlorides to the steel/concrete interface or carbo

The Notices on Electrical Installation for Cathodic Protection System All electrical installation works shall be undertaken in accordance with international (or other applicable national) electrical safety standards. Below are some notices on electrical installation for cathodic protection system. Note 1: The electrical power supply for the cathodic protection system may be provided by transformerrectifier(s) powered by an electrical supply from a mains voltage distribution system. The direct current and monitoring cables of

How is the MMO Anode Installed in Cathodic Protection? Before anode installation, the surface should be well prepared. The concrete surfaces intended to receive installation of anode material, e.g. conductive coatings or activated titanium mesh within a cementitious overlay, shall be prepared so as to present, as a minimum, a clean, non‑friable surface and in order that the substrate to overlay adhesion. Cathodic protection conductive coatings generally require a minimum of preparation to leave a maximum of cement paste and mini