Resumo

RODRIGUEZ-REYNA, S.L.; MIRANDA-VIDALES, J.M.; ESPERICUETA-GONZALEZ, D.E.  e  GAONA-TIBURCIO, C. Results of an ECE Varying Degrees of Corrosion and Time of Application of the Technique. Ing. invest. y tecnol. [online]. 2012, vol.13, n.4, pp.425-431. ISSN 2594-0732.

The objective of the Electrochemical Chloride Extraction (ECE) is to remove the chloride ions (Cl-) which are embedded in concrete, since these ions are considered to result in accelerating the process of corrosion in steel reinforcement. The ECE is an electrochemical technique in which ions Cl- are transported to the outside of the concrete by means of an electric field. In this paper we present the results of mortar samples made in the laboratory. The specimens were previously contaminated with 2% NaCl by mass of cement, and stored in water curing tanks at constant laboratory of 95% RH for one and sixty days. Afterward, mortars underwent an ECE in times of 15, 30 and 60 days of treatment. The results obtained under these conditions show that increasing the duration of the ECE will get a higher amount of Cl-ions removed from the mortar. It should be noted that the extent of the corroded reinforcement is a critical variable in the effectiveness of the technique.

Palavras-chave : electrochemical chloride extraction; reinforcing steel; mortar; electrochemical methods of rehabilitation; durability; corrosion.