Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides
✍ Scribed by C. Arya; P.R.W Vassie
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 597 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0008-8846
No coin nor oath required. For personal study only.
✦ Synopsis
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.