Application of cathodic protection for controlling macrocell corrosion in chloride contaminated RC structures

Cheung, Mo Shing; Cao, Chong

doi:10.1016/j.conbuildmat.2013.04.010

Cited by 73 publications

(23 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One relates to the instant-off potential (the potential measured immediately when the CP system is switched off) of the reinforcement. The other one relates to the potential decay (depolarization) of the reinforcement [16, 17]. The specifications in national and international standards for the criteria were principally established on the empirical evaluation of the data obtained from successfully operated CP cases [18].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of cathodic protection for chloride contaminated reinforced concrete

et al. 2018

View full text Add to dashboard Cite

Cathodic protection (CP) is being increasingly used on reinforced concrete structures to protect steel reinforcing bars from corrosion in aggressive conditions. Due to the complexity of environmental conditions, the design specifications in national and international standards are still open to discussion to achieve both sufficient and efficient protection for reinforced concrete structures in engineering practices. This paper reports an experimental research to investigate the influence of chloride content on concrete resistivity, rebar corrosion rate and the performance of CP operation using different current densities. It aims to understand the correlation between the chloride content and concrete resistivity together with the CP current requirement, and to investigate the precision of the CP design criteria in standards.

show abstract

Section: Introductionmentioning

confidence: 99%

An experimental study of cathodic protection for chloride contaminated reinforced concrete

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The method is also implemented on RC structures. The use of the method has been widely reported [7][8][9]. However, researchers and engineers still challenged in exploring the field of designing and evaluating of the protection system [10].…”

Section: Introductionmentioning

confidence: 99%

Simulation the effect of anode-cathode displacement and anode type on reinforced concrete cathodic protection using BEM

et al. 2018

View full text Add to dashboard Cite

The aim of the study is to simulate the effect of anode-cathode displacement and anode type on the potential distribution of reinforced concrete (RC) cathodic protection (CP) system using boundary element method (BEM). For the simulation, Laplace equation was used to model the RC domain. The boundary conditions for the anode and cathode (reinforcing steel/rebar) were represented by its polarization curve. By using BEM, the electrical potential values on the whole domain should be calculated. Therefore, the effects of those parameters were studied based on the rebar electrical potential. For the study, the CP system model and geometry were obtained from a previous researcher. The BEM simulation results show that the anode-cathode displacement affects the distribution of electrical potential on the protected reinforcing steel. It was consistent with the previous research result. The results also show, as expected, that the anode type influences the electrical potential value on the rebar. Hence, those parameters should be considered in designing and/or evaluating the RC CP system.

show abstract

“…When the damaged area is repaired and patched, the previously protected adjacent State-of-the-art review of cathodic protection for reinforced concrete structures Byrne, Holmes and Norton lengths of steel can begin to corrode as they are now more active than the repaired portion (Broomfield, 2000). Sacrificial anodes embedded into the patch repair can prevent such an issue (Cheung and Cao, 2013) and further the protection provided by the repair process, as shown in Figure 5. Similar discrete-style anode arrays can also be placed in drilled holes at intervals throughout a concrete structure.…”

Section: Anode Jacketsmentioning

confidence: 99%

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

Byrne¹,

Holmes²,

Norton³

2016

Magazine of Concrete Research

View full text Add to dashboard Cite

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.

show abstract

Application of cathodic protection for controlling macrocell corrosion in chloride contaminated RC structures

Cited by 73 publications

References 17 publications

An experimental study of cathodic protection for chloride contaminated reinforced concrete

An experimental study of cathodic protection for chloride contaminated reinforced concrete

Simulation the effect of anode-cathode displacement and anode type on reinforced concrete cathodic protection using BEM

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

Contact Info

Product

Resources

About