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Electrochemical significance of cumulative corrosion rate of reinforced concrete in tropical natural marine environment

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Document pages: 8 pages

Abstract: The purpose of this paper is to discuss the meaning of the cumulative corrosion rate () of reinforced concrete in the tropical marine microclimate of Yucatan Peninsula, and determine four stages, which correspond to passivation, initial de passivation, destruction and subsequent formation of corrosion layer, as well as the nucleation and development of cracks. 60 Portland cement concrete cylinders are exposed to 50 ℃ tropical marine environment   I come from the beach. Half of the samples were embedded with reinforcement in the center of the sample (corrosion measurement), and the other half were made of plain concrete (chloride measurement). Five water cement ratios (w C) and three times of curing (CT) were tested, representing common practices in the region. The corrosion rate was monitored using the linear polarization resistance technique (Rp) which enables calculating the apparent and cumulative corrosion rate. Representative results indicated that was effective not only to detect the beginning and duration of the reported stages but also to find the right influence of CT and w c ratios on the corrosion performance of reinforced concrete.

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