Experimental study evaluates galvanic anodes' impact on corrosion current density in repairs, suggesting alternative measurements.
Patch repair is one of the most adopted methods for repairing distressed reinforced concrete (RC) roof slabs. Galvanic anodes in the patch repair area can overcome the formation of incipient anodes and extend the service life of the repair work. This experimental study evaluates the protection criterion to assess the performance of galvanic anodes in patch repair regions. The potential and the current distribution in the RC slabs were monitored for 440 days. As per EN ISO 12696: 2022, the 100‐mV depolarisation potential criterion is not applicable for galvanic anodes embedded in the patch repair region. Alternatively, this paper explores the use of output current from the anode (anodic current) as a parameter to assess the performance of the galvanic anode. The reducing trend of corrosion current density values of steel rebar in the repair region over a period indicates the performance of galvanic anodes, and this was also validated using numerical simulation.
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Vijayaraghavan et al. (2025) studied this question.
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