Effectiveness of a conductive cementitious mortar anode for cathodic protection of steel in concrete

Bertolini, Luca; Bolzoni, F.; Pastore, Tommaso; Pedeferri, Pietro

doi:10.1016/j.cemconres.2003.10.018

Cited by 99 publications

(57 citation statements)

References 2 publications

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“…The recommendation for the CP current density is in the range 5-20 mA/m² to the steel reinforcement [28]. Other relevant works reported the recommendation of using 10-15 mA/m² referred to the concrete surface overlaid by an anode of cementitious mortar embedding conductive fibers [29]. In the present study, the pathways of contamination are especially severe.…”

Section: Cathodic Protection (Cp) Method 1 St Phasementioning

confidence: 75%

“…Homogeneous and almost continuous ∆Efeed values indicate good condition of the anode system, while sharp increases of that parameter show damages in the anode [20,29].…”

Section: Monitoringmentioning

confidence: 99%

“…To control the efficiency of CP and CPre as keepers of protection conditions of steel, the "100 mV decay" criterion was used, as is specified in ISO 12696:2012 [28]. This criterion has been also extensively employed for this purpose by several researchers [29,30]. The method consists in obtaining the 4 hours potential decay (∆Edecay), as the difference between Ec 4h (the value of Ec 4 hours after the current switch off), and the instant-off cathodic potential Ec io , (the value of this parameter measured 1 s after the current switch off).…”

Section: Monitoringmentioning

confidence: 99%

“…Currently, a wide range of anode materials are being used: from oxide activated high conductive metals to a new generation of modified cementitious materials, generally with carbon-related products and composites [8][9][10][11][12][13]. Also, assemblies composed by metal-carbon cementitious material mixes are recently proposed as anodes for CP [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

Calero

Climent

Terradillos

2017

Journal of Electroanalytical Chemistry

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Cathodic protection is a method to protect reinforced concrete structures located in saline environments against corrosion effect produced by Cl -penetration. But there are significant differences among these aggressive environments. The aim of this article is to show how different ways of saline contamination can affect the efficiency of cathodic protection. For this research, a series of laboratory specimens representing structural elements were subjected to two versions of cathodic protection (cathodic protection strictly speaking, and cathodic prevention), while two different ways of saline contamination were applied (permanent immersion in a NaCl solution and periodic pouring of discrete amounts of a NaCl solution in atmospheric exposure). Depending on the saline environment, differences in the efficiency of cathodic protection were detected. Results can be useful to determine the specific features of the cathodic protection to be applied in each case, taking into account both the initial Clcontent of the structural element and the particular saline environment where it is located.

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Section: Cathodic Protection (Cp) Method 1 St Phasementioning

confidence: 75%

“…Homogeneous and almost continuous ∆Efeed values indicate good condition of the anode system, while sharp increases of that parameter show damages in the anode [20,29].…”

Section: Monitoringmentioning

confidence: 99%

Section: Monitoringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

Calero

Climent

Terradillos

2017

Journal of Electroanalytical Chemistry

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“…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%

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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Electrochemical Techniques

Bertolini

Elsener

Pedeferri³

et al. 2013

Corrosion of Steel in Concrete

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Effectiveness of a conductive cementitious mortar anode for cathodic protection of steel in concrete

Cited by 99 publications

References 2 publications

Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

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

Electrochemical Techniques

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