Abstract

The corrosion of steel in the global reinforced concrete infrastructure is at epidemic proportions. The resulting damage is seen in highway bridges, apartments, paper mills and aquariums. In North America reinforcement corrosion in concrete bridges and parking garages generates cost estimates that range from $325 million to $1 billion per year.1 One anode material gaining acceptance is zinc thermal spray (TS) coating. Since the first installation in 1983, zinc TSCP systems have been applied to reinforced concrete bridges, docks, parking garages and even aquariums. This paper discusses the performance of field applications of zinc thermal spray coating CP systems. The systems discussed have sprayed surface areas ranging from 280m2 to 24,000m2 The installations are on major concrete structures. The performance of both galvanic and impressed current systems are discussed.

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