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Modelling of reinforcement corrosion - Corrosion with extensive cathodes
Reinforcement corrosion is the most common reason for the premature deterioration of a concrete structure. In case of a partial depassivation of the reinforcement macrocells are formed with considerable metal removal rates. Thus an assessment of the macrocell current becomes of great concern. To find out, whether this can be achieved by numerical calculations, specimens have been fabricated and simulated by the use of a boundary element program. In the paper the results of the calculations are presented and compared to electrochemical measurements on the real specimens. The results of the numerical calculations in comparison to the measured values show, that a simulation of reinforcement corrosion leads to comprehensive results. A numerical analysis can be useful to estimate the macrocell currents and quantify the geometrical influence of arbitrary corrosion systems. Furthermore it is possible to study effects of changes in single parameters, like driving voltage or polarisation behaviour to quantify dominating parameters. Further investigations will be carried out to improve the results and simulate more complex reinforcement arrangements.
Modelling of reinforcement corrosion - Corrosion with extensive cathodes
Reinforcement corrosion is the most common reason for the premature deterioration of a concrete structure. In case of a partial depassivation of the reinforcement macrocells are formed with considerable metal removal rates. Thus an assessment of the macrocell current becomes of great concern. To find out, whether this can be achieved by numerical calculations, specimens have been fabricated and simulated by the use of a boundary element program. In the paper the results of the calculations are presented and compared to electrochemical measurements on the real specimens. The results of the numerical calculations in comparison to the measured values show, that a simulation of reinforcement corrosion leads to comprehensive results. A numerical analysis can be useful to estimate the macrocell currents and quantify the geometrical influence of arbitrary corrosion systems. Furthermore it is possible to study effects of changes in single parameters, like driving voltage or polarisation behaviour to quantify dominating parameters. Further investigations will be carried out to improve the results and simulate more complex reinforcement arrangements.
Modelling of reinforcement corrosion - Corrosion with extensive cathodes
Warkus, J. (author) / Raupach, M. (author)
Materials and Corrosion ; 57 ; 920-925
2006
6 Seiten, 19 Bilder, 3 Tabellen, 7 Quellen
Article (Journal)
English
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