The monitoring of corrosion in reinforced concrete structures is considered an important preventive factor against the corrosive damage. The present paper shows the design and construction of a device which performs remote measurements of the polarization resistance of reinforcing steel, this was made using the electrochemical technique of linear polarization resistance as a method to obtain the information of the corrosive process. The development was carried out by implementing a potentiostat based on a free development platform. The design allows to store all the data on a physical memory and to send the results through the mobile network to a web server, where the measured values can be analyzed using an internet connection.The linear polarization resistance measurements were made in cylindrical concrete specimens with rebars of ½ ”, each one instrumented with embedded electrodes of Copper/Copper sulfate and graphite. The specimens were subjected to a saturated environment of chlorides (3.5%) where the corrosive process was monitored with the developed system. The results were compared with tests performed on a commercial potentiostat / galvanostat, where the values obtained have an mean of 4.83%.
ResumenEn el presente trabajo se diseñó y construyó un equipo de monitoreo remoto que permite obtener los potenciales de corrosión en los aceros de refuerzo inmersos en concreto reforzado, los cuales se sometieron previamente al ataque de cloruros en un ambiente hostil. El sistema de monitoreo, basado en la norma ASTM C876-91, permite determinar desde 0 a 100% la probabilidad de corrosión sobre las muestras evaluadas. El sistema otorga la facilidad para realizar su instalación en campo, siempre y cuando exista cobertura de red celular, puede operarse de forma remota mediante mensajes de texto para iniciar o detener las mediciones, cuyos resultados son almacenados en un datalogger local en tarjetas microSD, posteriormente se envían mediante el servicio general de paquetes vía radio (GPRS) a un servidor Web, que permite dar accesibilidad a los datos mediante una página Web, en donde se hormigón usadas como referencia para el monitoreo de la degradación fuepotencial de corrosión generaron la respuesta de la interfase medio de exposición-hormigón, que corresponde a un sistema con 90% de probabilidad de corrosión.
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