Residual protection of steel following suspension of Impressed Current Cathodic Protection system on a wharf structure

被引：15

作者：

Law, David W. ^{[1
]}

Nicholls, Peter ^{[1
,2
]}

Christodoulou, Christian ^{[3
]}

机构：

[1] RMIT Univ, Sch Engn, Melbourne, Vic 3001, Australia

[2] Select Solut, 308 Hyde St, Yarraville, Vic 3043, Australia

[3] AECOM Ltd, Colmore Bldg,20 Colmore Circus Queensway, Birmingham B4 6AT, W Midlands, England

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 210卷

关键词：

Concrete; Mild steel; Cathodic protection; Repassivation; Residual protection; CONCRETE; CHLORIDE; PROFILES;

D O I：

10.1016/j.conbuildmat.2019.03.135

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Impressed Current Cathodic Protection (ICCP) is an established technique for the remediation of steel reinforced concrete structures. There have been examples of residual protection being afforded to structures where the ICCP system has been de-activated but to date no detailed investigation over the duration of the de-activation period has been undertaken. This study reports the findings of a systematic study in which an ICCP system was suspended for a period of 106 days. The results showed that based on the absolute passive potential criterion of maintaining a potential more positive than -150 mV with respect to a silver silver chloride reference electrode, 10% of the elements studied displayed residual protection. However, analysing the data based on the movement of the instant off potential to more positive values with time showed that 85% displayed evidence of residual protection. The data displayed a good correlation between charge passed and the duration of residual protection. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：48 / 55

页数：8

共 19 条

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