Modelación computacional de la corrosión del refuerzo metálico de un concreto carbonatado
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Resumen
En el sector civil de la construcción, el concreto y el refuerzo metálico representan aun los materiales de mayor importancia, aunque sean muy vulnerables por los agentes atmosféricos, como en el caso de su degradación por corrosión. En este artículo se presenta un trabajo de modelación computacional de la corrosión del refuerzo metálico de un concreto carbonatado, basado en datos experimentales de un proceso de carbonatación acelerada y sucesiva corrosión de las varillas metálicas. El modelo ha sido completado incorporando los datos cinéticos experimentales de las reacciones electroquímicas de los electrodos que están en relación con el avance del frente de carbonatación. A partir de los valores experimentales del potencial de corrosión, densidad de corriente de corrosión, pendientes anódicas y catódicas de la curva de Tafel, se estiman las corrientes de intercambio anódicas y catódicas y finalmente se simula la corrosión de las varillas metálicas de muestras de concreto reforzado.
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