Prestressed cathodic prevention

The cost of CP systems varies depending on the type of system used. In this regard, Virginia DOT has published a report entitled, Evaluation of Anodes for Galvanic Cathodic Prevention of Steel Corrosion in the Prestressed Concrete Piles in Marine Environments in Virginia (30). The data in this report and the data in the literature published by Virmani (2) suggest that the sprayed Al-Zn-In alloy or the zinc-hydrogel systems with a life of 10-20 years cost 108-129/m. ... 

Continuity and short circuits can be remedied prior to installation if necessary. At present all applications of cathodic protection to structures with prestressing are experimental with the exception of the cathodic prevention applied to new bridges in Italy to keep corrosion from initiating. This uses very low level currents and voltages with. special control system. to prevent hydrogen embrittlement,... 

Cathodic prevention (CPR) is applied for new reinforced or prestressed structures, which are not contaminated by chlorides, but their contamination is expected during operation (for example, as a result of salt application on streets or the action of a sea atmosphere, etc.). In such conditions, as a prevention, the reinforced concrete structure is subject to a process ensuring CP. Pedeferri... 

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