Effect of the application method and coating thickness on the relationship between resistivity and corrosion rate under natural marine exposure
DOI:
https://doi.org/10.21041/ra.v16i3.1116Keywords:
corrosion, concrete electrical resistivity, corrosion rate, correlation, natural marine exposureAbstract
This study aims to evaluate the effect of the design method and concrete cover on the correlation between resistivity and corrosion rate, reinforced concrete specimens—prepared using a volumetric design (M1) and an aggregate packing method (M2)—were exposed to a tropical marine environment, with electrochemical parameters measured periodically. The results indicated that both methods were equivalent in maintaining the steel in a passive state throughout the study period. However, a disparity was observed in the ρ-icorr correlation fits: as the cover thickness increased, the fit for M1 diverged from theoretical models, whereas the fit for M2 converged with them. When applying models, attention must be paid to all conditions affecting the structural element to avoid overestimating corrosion during the initial stages.
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Copyright (c) 2026 Briceño-Mena, J. A. Soria-Castro, M., Pérez-García, E. J., Nieves-Mendoza, D., Castro-Borges, P.
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