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INFLUENCE OF CATHODE-TO-ANODE AREA RATIO AND SEPARATION DISTANCE ON GALVANIC CORROSION CURRENTS OF STEEL IN CONCRETE CONTAINING CHLORIDES

ARYA, C; VASSIE, PRW; (1995) INFLUENCE OF CATHODE-TO-ANODE AREA RATIO AND SEPARATION DISTANCE ON GALVANIC CORROSION CURRENTS OF STEEL IN CONCRETE CONTAINING CHLORIDES. CEMENT CONCRETE RES , 25 (5) pp. 989-998.

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Abstract

Corrosion of steel embedded in concrete was modelled using a 4m long beam containing a bar in seven segments, one mild steel and six stainless steel, which could be electrically connected or isolated by external switches. The concrete mix was dosed with 3% Cl to initiate corrosion. The current flowing between the mild steel and the stainless steel was monitored using a zero resistance ammeter for a range of connections to investigate the influence of the ratio of cathode/anode area and cathode-anode separation.It was found that the current increased with increasing cathode/anode area ratio but the rate of increase decreased with increasing cathode/anode ratio. The current decreased with increasing separation between the anode and cathode although the cathode elements most distant from the anode contributed a significant current.

Type: Article
Title: INFLUENCE OF CATHODE-TO-ANODE AREA RATIO AND SEPARATION DISTANCE ON GALVANIC CORROSION CURRENTS OF STEEL IN CONCRETE CONTAINING CHLORIDES
Keywords: NOISE
UCL classification: UCL > School of BEAMS > Faculty of Engineering Science
UCL > School of BEAMS > Faculty of Engineering Science > Civil, Environmental and Geomatic Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/1363424
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