Abstract
The chapter discusses the deficiencies in the thickness and the density of concrete structures that require additional corrosion protection measures in a construction process. The corrosion protection of reinforcing steel in steel-reinforced concrete and prestressed concrete structures acts through the alkalinity of the porous concrete water content because the steel passivates under many conditions. The application of cathodic protection to reinforced concrete structures requires proper technical and economic considerations such as design and installation; determination of the state of corrosion of the reinforcing steel; assuming an extended electrical continuity through the reinforcing steel; making use of different concrete replacement systems for cathodic protection and proper maintenance; and commissioning and control of the cathodic protection. Cathodic protection cannot work with prestressed concrete structures that have electrically insulated, coated pipes. There is a positive experience in the case of a direct connection without coated pipes; this is the protection of buried prestressed concrete pipelines by zinc anodes.
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