A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cathodic protection of steel in concrete using magnesium alloy anode
The paper concentrates on evaluating the long term performance of Mg anode for cathodically protecting the steel embedded in concrete. Corrosion of steel embedded in concrete structures and bridges is prevented using cathodic protection. Majority of the structures protected employ impressed current system. Use of sacrificial system for the protection of steel in concrete is not as widely employed. The use of magnesium anodes for the above purpose is very limited. This study has been carried out with a view to analyse the use of magnesium alloy anode for the cathodic protection of steel embedded in concrete. Magnesium alloy anode, designed for three years life, was installed at the center of reinforced concrete slab, containing 3.5% sodium chloride with respect to weight of cement, for cathodic protection. Potential of the embedded steel and the current flowing between the anode and the steel were monitored, plotted and analyzed. Chloride concentration of concrete at different locations, for different timings, were also determined and analyzed. The magnesium anode was found to shift the potential of the steel to more negative potentials initially, at all distances and later towards less negative potentials. The chloride concentration was found to decrease at all the locations with increase in time. The mechanism of cathodic protection with the sacrificial anode could be correlated to the removal of corrosive ions such as chloride from the vicinity of steel.
Cathodic protection of steel in concrete using magnesium alloy anode
The paper concentrates on evaluating the long term performance of Mg anode for cathodically protecting the steel embedded in concrete. Corrosion of steel embedded in concrete structures and bridges is prevented using cathodic protection. Majority of the structures protected employ impressed current system. Use of sacrificial system for the protection of steel in concrete is not as widely employed. The use of magnesium anodes for the above purpose is very limited. This study has been carried out with a view to analyse the use of magnesium alloy anode for the cathodic protection of steel embedded in concrete. Magnesium alloy anode, designed for three years life, was installed at the center of reinforced concrete slab, containing 3.5% sodium chloride with respect to weight of cement, for cathodic protection. Potential of the embedded steel and the current flowing between the anode and the steel were monitored, plotted and analyzed. Chloride concentration of concrete at different locations, for different timings, were also determined and analyzed. The magnesium anode was found to shift the potential of the steel to more negative potentials initially, at all distances and later towards less negative potentials. The chloride concentration was found to decrease at all the locations with increase in time. The mechanism of cathodic protection with the sacrificial anode could be correlated to the removal of corrosive ions such as chloride from the vicinity of steel.
Cathodic protection of steel in concrete using magnesium alloy anode
Kathodischer Schutz von Stahl in Beton mit einer Magnesiumlegierungsanode
Parthiban, G.T. (author) / Parthiban, Thirumalai (author) / Ravi, R. (author) / Saraswathy, V. (author) / Palaniswamy, N. (author) / Sivan, V. (author)
Corrosion Science ; 50 ; 3329-3335
2008
7 Seiten, 9 Bilder, 3 Tabellen, 69 Quellen
Article (Journal)
English
Cathodic protection of steel in concrete using magnesium alloy anode
| British Library Online Contents | 2008
Alternate Anode Materials for Cathodic Protection of Steel Reinforced Concrete
| British Library Conference Proceedings | 2001
Cathodic protection of reinforced concrete - which anode?
| British Library Conference Proceedings | 1996
Anode systems for cathodic protection of steel reinforcement in concrete structures
| British Library Online Contents | 2013
SACRIFICIAL ANODE, CATHODIC PROTECTION METHOD, AND CONCRETE STRUCTURE
| European Patent Office | 2022