Marine reinforced concrete structures are expected to suffer from chloride-induced Corrosion during their service life. The use of in-built cathodic protection system (referred as Cathodic Prevention (CPrev)) can be used to prevent corrosion by maintaining steel passivity. Such a CPrev system has been implemented on a 5.4 km long marine viaduct exposed to aggressive environment in the Indian Ocean. The tidal and submerged parts of the 48 piers were selected to receive this enhanced corrosion protection. The paper emphasizes particularly on the anode design, anode zone configuration and installation practices.

Innovative solutions with respect to the anode type and configurations were implemented to meet with the specific requirements of the viaduct construction scheme. The results of initial performance and early polarization behavior between the submerged and tidal parts are also described and discussed.

Subject
Electric current, Ribbons, Test methods, Installation, Anode resistance, Steel, Construction, Immersion, Polarization, Electrodes, Concrete, Electrode potential, Anodes
Keywords:
cathodic prevention, cathodic protection, reinforced concrete, current density, submerged concrete
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2020
Association for Materials Protection and Performance (AMPP)
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