The output of sacrificial current by two metallized coatings was monitored under well-defined conditions. Experiments were conducted at two relative humidities (RH). The performance of a zinc-aluminum alloy (78:22) was equal or slightly superior to that of pure zinc-coated anodes. However, there was a steady decline in current density output with time, which was attributed to oxidation products forming at the sacrificial anode/concrete interface.

Subject
Depolarization, Zinc rich coatings, Galvanic anodes, Rebar, Zinc anodes, Anode surfaces, Density, Current densities, Metallic coatings, Zinc, Galvanic current, Alloys, Concrete
Keywords:
aluminum, anodes, coatings, current density, relative humidity, reinforced concrete, zinc
NACE International
1998
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