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Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides
Corrosion of steel embedded in concrete was modelled 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 monitoring 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 cathode and the anode although the cathode elements most distant from the anode contributed a significant current.
Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides
Corrosion of steel embedded in concrete was modelled 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 monitoring 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 cathode and the anode although the cathode elements most distant from the anode contributed a significant current.
Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides
Einfluß von Kathoden-zu-Anodenbereichs-Verhältnis und -Trennentfernung auf galvanische Korrosionsströme in chloridhaltigem Beton
Arya, C. (author) / Vassie, P.R.W. (author)
Cement and Concrete Research ; 25 ; 989-998
1995
10 Seiten, 5 Bilder, 7 Tabellen, 17 Quellen
Article (Journal)
English
galvanischer Strom , Stahlbeton , Chlorid , Gehalt (Zusammensetzung) , Wechselwirkung , nichtrostender Stahl , Korrosion , elektrischer Strom , Kathode , Anode , Oberfläche , Elektrochemie , Beton , elektrische Leitfähigkeit , Armierung , Stahl , Korrelation , Widerstandswert (elektrisch) , geometrischer Parameter , Verminderung , Erhöhung , elektrochemische Zelle , Probenpräparation
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