Prevention of steel corrosion in concrete exposed to seawater with submerged sacrificial anodes

被引：90
|
作者：
Bertolini, L [1 ]
Gastaldi, M [1 ]
Pedeferri, M [1 ]
Redaelli, E [1 ]
机构：
[1] Politecn Milan, Dipartimento Chim Fis Applicata, I-20133 Milan, Italy
来源：
CORROSION SCIENCE | 2002年 / 44卷 / 07期
关键词：
reinforced concrete; chlorides; cathodic protection; cathodic prevention; sacrificial anode; throwing power; potential decay;
D O I：
10.1016/S0010-938X(01)00168-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1497 / 1513
页数：17
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