Prevention of steel corrosion in concrete exposed to seawater with submerged sacrificial anodes
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- 作者：Bertolini ; Luca ; Gastaldi ; Matteo ; Pedeferri ; MariaPia ; Redaelli ; Elena
- 关键词：Reinforced concrete ; Chlorides ; Cathodic protection ; Cathodic prevention ; Sacrificial anode ; Throwing power ; Potential decay
- 刊名：Corrosion Science
- 出版年：2002
- 出版时间：July, 2002
- 年：2002
- 卷：44
- 期：7
- 页码：1497-1513
- 全文大小：497 K
文摘
This paper presents the results of a study of the effectiveness of submerged sacrificial anodes in preventing the onset of pitting corrosion in the emerged part of marine piles. Experimental tests were carried out on reinforced concrete columns with steel embedded both in chloride free concrete and chloride contaminated concrete in order to compare the effects of sacrificial anodes on passive steel and on corroding steel. Results have shown, at least under the present testing conditions, that sacrificial anodes may be more effective in preventing corrosion initiation (i.e. in providing cathodic prevention) than in controlling ongoing pitting corrosion (i.e. in guaranteeing cathodic protection). Monitoring criteria for this type of prevention are also discussed.