The selection and use of cathodic protection systems for the repair of reinforced concrete structures

Wilson, K; Jawed, Mohammed; Ngala, Vitalis

doi:10.1016/j.conbuildmat.2012.05.037

Cited by 88 publications

(48 citation statements)

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“…Various research papers discuss the reduced maintenance requirements of galvanic systems compared with impressed current systems (Broomfield, 2000;Byrne et al, 2016;Polder, 1998;Polder et al, 2014;Sohanghpurwala, 2009;Wilson et al, 2013). Such technologies are based on the principle of galvanic cells, which do not require mechanical and electrical equipment that would need a relatively higher level of maintenance and also have a manufacturerdisclosed annual maintenance cycle, service life and replacement life.…”

Section: Standard Monitoring Requirements and Maintenancementioning

confidence: 99%

Discussion: Hybrid anode concrete corrosion protection – independent study

Dodds

Christodoulou²,

Goodier

et al. 2017

Proceedings of the Institution of Civil Engineers - Constructio

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Section: Standard Monitoring Requirements and Maintenancementioning

confidence: 99%

Discussion: Hybrid anode concrete corrosion protection – independent study

Dodds

Christodoulou²,

Goodier

et al. 2017

Proceedings of the Institution of Civil Engineers - Constructio

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“…When this method is used for concrete it is limited to small targeted repairs, where there is limited budget or where the structure has a short life expectancy (Wilson et al, 2013). These systems are often used on oil platforms for both concrete and steel structures below water (Broomfield, 2000).…”

Section: Sacrificial Anode Cathodic Protectionmentioning

confidence: 99%

“…Due to the high resistivity of concrete, galvanic anodes (as shown in Figure 2) often cannot economically deliver enough current to provide protection. In these cases, the more costly impressed current cathodic protection (ICCP) is used (Wilson et al, 2013), which requires a constant low direct current (DC) power supply. A summary of anode types for sacrificial anode cathodic protection (SACP) and ICCP is given in Table 1.…”

Section: Cathodic Protection Technologies For Reinforced Concrete Strmentioning

confidence: 99%

“…Impressed current cathodic protection is much more commonly used for reinforced concrete than SACP as it can address significant corrosion issues in larger structures with longer life expectancies (Wilson et al, 2013 (Kean and Davies, 1981). The basic elements of an ICCP system are the same as in SACP.…”

Section: Impressed Current Cathodic Protectionmentioning

confidence: 99%

“…For CP of reinforced concrete, research has either centred on the anode materials and types used (Bertolini et al, 2004;Jing and Wu, 2011;Parthiban et al, 2008;Wilson et al, 2013;Xu and Yao, 2009), novel monitoring systems (Pruckner et al, 1996;Ward et al, 2014) or examining current distribution within the reinforcement (Hassanein et al, 2002;Xu and Yao, 2009). It has been found that the majority of current is impressed on the reinforcement placed nearest the surface, with little protection afforded to the other layers (BSI, 2012;Hassanein et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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State-of-the-art review of cathodic protection for reinforced concrete structures

Byrne¹,

Holmes²,

Norton³

2016

Magazine of Concrete Research

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Cathodic protection (CP) limits the corrosion of a metal surface by making it the cathode of an electrochemical cell.This can be achieved either by using a more active sacrificial anode to create a driving current, or by using inert anodes and impressing a current onto the cathode surface using an external direct current (DC) source. Impressed current cathodic protection (ICCP) is preferred where widespread protection is required, particularly in reinforced concrete structures. ICCP needs a constant DC power supply that is usually provided through a grid connection or independent generators. This paper presents the currently available CP systems for reinforced concrete, particularly ICCP, and the possibility of using self-sufficient and renewable energy systems. The potential for overcoming the mismatch (due to intermittent current) in energy provision from renewable sources with energy needs for CP (constant current) is discussed by exploring methods of storing energy and examining the level of protection provided by intermittent current. Areas that require further research to optimise the design of such systems are highlighted.

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Influence of accidental over‐polarisation on the mechanical properties of cathodically protected pre‐tensioned tendons

O'Flaherty

Elomari

Lambert

2020

Materials & Corrosion

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This paper investigates the performance of pre‐tensioned tendons deliberately exposed to higher than normal impressed current cathodic protection (ICCP) to replicate accidental over‐polarisation. Plain ungalvanised tendons, 5.4 mm Ø, were pre‐stressed in moulds and cast in mortar. Two levels of pre‐tensioning were investigated, low (~30% ultimate tensile strength [UTS]) and high level (~80% UTS). Three different degrees of corrosion with target losses of cross‐sectional area of 0%–1%, 2%–4% and 4%–7%, respectively, were employed to replicate in situ conditions. ICCP was applied to the tendons at two levels of polarisation, normal protection (ICCP‐N) in the range of −650 to −750 mV and overprotection (ICCP‐O) ranging between −850 and −1300 mV, both versus Ag/AgCI/0.5‐M KCI for an extended period. After ICCP, the tendons were removed from the mortar and slow strain tensile tests were conducted. The results show that ICCP at both normal and overprotection had no significant influence on the elastic modulus, yield, 0.2% proof stress and ultimate strength of the tested tendons. Although ductility was reduced, fracture occurred after reaching the ultimate strength.

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The selection and use of cathodic protection systems for the repair of reinforced concrete structures

Cited by 88 publications

References 0 publications

Discussion: Hybrid anode concrete corrosion protection – independent study

Discussion: Hybrid anode concrete corrosion protection – independent study

State-of-the-art review of cathodic protection for reinforced concrete structures

Influence of accidental over‐polarisation on the mechanical properties of cathodically protected pre‐tensioned tendons

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