A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigation of steel corrosion in cracked concrete: Evaluation of macrocell and microcell rates using Tafel polarization response
The objectives o the work presented in this paper are: (1) to develop an understanding of the relationship between the potential and current density along the length of a steel bar with a macrocell; (2) to predict the macrocell response of a steel bar embedded in cracked concrete using the polarization responses of active and passive steel; (3) to evaluate the relative contributions of the macro and micro cell components to the total corrosion of steel located in cracked concrete. Inhomogeneous corrosion in reinforced concrete is investigated using a beam with a flexural crack intersecting the reinforcement. An Evans diagram representation of the macrocell corrosion system is developed. The relationship between the current density and the potentials relative to the crack obtained from the Tafel polarization responses of active and passive steel in concrete compares favorably with the experimental values. When both microcell and macrocell mechanisms contribute to metal loss at the crack, the Evans diagram representation indicates that an increase in the macrocell current density results in a decreasing contribution from the local microcell at the macrocell anode.
Investigation of steel corrosion in cracked concrete: Evaluation of macrocell and microcell rates using Tafel polarization response
The objectives o the work presented in this paper are: (1) to develop an understanding of the relationship between the potential and current density along the length of a steel bar with a macrocell; (2) to predict the macrocell response of a steel bar embedded in cracked concrete using the polarization responses of active and passive steel; (3) to evaluate the relative contributions of the macro and micro cell components to the total corrosion of steel located in cracked concrete. Inhomogeneous corrosion in reinforced concrete is investigated using a beam with a flexural crack intersecting the reinforcement. An Evans diagram representation of the macrocell corrosion system is developed. The relationship between the current density and the potentials relative to the crack obtained from the Tafel polarization responses of active and passive steel in concrete compares favorably with the experimental values. When both microcell and macrocell mechanisms contribute to metal loss at the crack, the Evans diagram representation indicates that an increase in the macrocell current density results in a decreasing contribution from the local microcell at the macrocell anode.
Investigation of steel corrosion in cracked concrete: Evaluation of macrocell and microcell rates using Tafel polarization response
Untersuchung der Stahlkorrosion in rissigem Beton: Abschätzung der Korrosionsgeschwindigkeit von Makro- und Mikro-Korrosionselementen durch Auswertung der Tafelpolarisation
Subramaniam, K.V. (author) / Bi, M. (author)
Corrosion Science ; 52 ; 2725-2735
2010
11 Seiten, 13 Bilder, 3 Tabellen, 27 Quellen
Article (Journal)
English
| British Library Online Contents | 2010
Macrocell Corrosion of Steel in Cracked Concrete
| British Library Conference Proceedings | 1994
Macrocell and Microcell Corrosion of Embedded Steels in Concrete with Chloride Ions
| British Library Conference Proceedings | 1996
| British Library Online Contents | 2013