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Influence of stray currents on corrosion of steel in concrete
The effects of stray current on corrosion of steel in concrete have been studied. Both the mechanisms of corrosion initiation on reinforcement initially passive and the effects of the stray current on reinforcement already corroding have been investigated. Tests were carried out on specimens of cement paste and concrete with steel inserts subjected to the circulation of DC and AC current. The influence of several factors was studied, such as: the type of current (AC or DC), the current density, the presence of interruptions in the circulation of current, the chloride content in the concrete. The mechanism of initiation of corrosion was also investigated by measuring changes in pH and chloride content induced by the stray current in the cement paste in the vicinity of the steel surface. Results showed that DC current can induce corrosion initiation on the reinforcement in the anodic zone only after it has circulated for a certain time. The aggressiveness of stray current was influenced by current density, the presence of chloride and interruptions in the current. AC current proved to be much less dangerous than DC, although it can influence the corrosion rate of steel in chloride contaminated concrete and stimulate macrocouples.
Influence of stray currents on corrosion of steel in concrete
The effects of stray current on corrosion of steel in concrete have been studied. Both the mechanisms of corrosion initiation on reinforcement initially passive and the effects of the stray current on reinforcement already corroding have been investigated. Tests were carried out on specimens of cement paste and concrete with steel inserts subjected to the circulation of DC and AC current. The influence of several factors was studied, such as: the type of current (AC or DC), the current density, the presence of interruptions in the circulation of current, the chloride content in the concrete. The mechanism of initiation of corrosion was also investigated by measuring changes in pH and chloride content induced by the stray current in the cement paste in the vicinity of the steel surface. Results showed that DC current can induce corrosion initiation on the reinforcement in the anodic zone only after it has circulated for a certain time. The aggressiveness of stray current was influenced by current density, the presence of chloride and interruptions in the current. AC current proved to be much less dangerous than DC, although it can influence the corrosion rate of steel in chloride contaminated concrete and stimulate macrocouples.
Influence of stray currents on corrosion of steel in concrete
Einfluß von Streuströmen auf die Korrosion von Stahl in Beton
Bertolini, I. (author) / Carsana, M. (author) / Pedeferri, P. (author)
2001
11 Seiten, 6 Bilder, 2 Tabellen, 7 Quellen
Conference paper
Storage medium
English
Stray current induced corrosion of steel fibre reinforced concrete
| Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017