Throwing power of cathodic prevention applied by means of sacrificial anodes to partially submerged marine reinforced concrete piles: Results of numerical simulations

Bertolini, Luca; Redaelli, Elena

doi:10.1016/j.corsci.2009.06.012

Cited by 60 publications

(41 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To simplify the geometry, it was chosen to create a two-dimen- sional model instead of a three-dimensional one, neglecting the presence of transversal steel bars (parallel to the section shown in Figure 2) and taking only longitudinal bars into account (in a similar situation it was demonstrated that the presence of transversal elements was negligible). 15 The electric connection among the rebars is guaranteed through the boundary conditions described in the "Boundary Conditions" section.…”

Section: Geometrymentioning

confidence: 99%

“…For these reasons, in similar cases, numerical models have been developed instead of experimental setups to study the potential and the current distribution in different RC structures. [13][14][15][16][17][18][19][20][21][22] In some cases, these models considered also the relationship between the electrochemical potential and CTL for damage forecast. [23][24] The goal of this study was to investigate how macrocell formation could affect the potential and the corrosion rate of steel in different steady-state situations, corresponding to different phases of the life of a hollow submerged RC structure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Modeling of Initiation and Propagation of Corrosion in Hollow Submerged Marine Concrete Structures

Pergola¹,

Lollini²,

Redaelli³

et al. 2013

Corrosion

View full text Add to dashboard Cite

When reinforced concrete structures exposed to marine environments have both saturated and aerated parts, as for instance submerged tunnels or car parks, a macrocell can develop. This may cause an increase in the potential and the corrosion rate of reinforcing steel in the saturated part. The aim of this paper is to study the effects of macrocells during corrosion initiation and propagation through numerical simulations of a wall separating a dry environment from seawater. When steel bars are passive, the macrocell increases the potential of rebars in saturated concrete and promotes steel depassivation. After corrosion initiation, the macrocell increases steel corrosion rate by several orders of magnitude, favouring also corrosion localisation. A sensitivity analysis was carried out to investigate the influence of the main parameters: the models showed that some electrochemical parameters, such as the cathodic Tafel slope of steel polarisation curve, have a strong influence on the results

show abstract

Section: Geometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Initiation and Propagation of Corrosion in Hollow Submerged Marine Concrete Structures

Pergola¹,

Lollini²,

Redaelli³

et al. 2013

Corrosion

View full text Add to dashboard Cite

show abstract

“…SACP is an attractive way to extend service life after corrosion has developed. It has inherent simplicity and low maintenance requirement (Sagues et al 1995;Funahashi et al 1997;Bertolini et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Tidal Water Effect on the Hybrid Cathodic Protection Systems for Marine Concrete Structures

Jeong

Jin

Chung

2012

ACT

View full text Add to dashboard Cite

This paper represents the behaviors of hybrid cathodic protection (hybrid CP) system in a reinforced concrete column specimen. Cathodic protection (CP) is widely used as a means of protecting corrosion for marine concrete structures such as harbor and offshore facilities. Specifically, hybrid CP, which is the combination both sacrificial anode cathodic protection (SACP) system and impressed current cathodic protection (ICCP) system, can be an optimum way to protect corrosion. Some complex concrete structures as well as harbor constructions are considered to be protected by both systems. Especially, it becomes more complicated to protect corrosion damage of concrete structures in the tidal and splash zones of marine environment. In case of Yellow Sea of the South Korea, the tidal zone reaches to 6~8m. On the condition that this system is well applied in the Yellow Sea, it is expected to show a good CP behavior to solve an underprotection problem, especially in tidal and splash zones. In this study, the hybrid system installed both the ICCP with Timesh anode and the SACP with zinc anode has been adopted to verify the current influence through laboratory experiment. CP potential and current have been investigated, in addition, 4-hour depolarization test has been involved to reveal the effectiveness of hybrid CP.

show abstract

“…Figure 13. Height of protection evaluated from FEM models for a pile in the splash zone, as a function of the pile radius (R), in the case of cathodic protection and cathodic prevention (Bertolini & Redaelli, 2009b).…”

Section: Cathodic Preventionmentioning

confidence: 99%

Corrosion of Steel in Concrete and Its Prevention in Aggressive Chloride-Bearing Environments

Bertolini¹,

Carsana²,

Gastaldi³

et al. 2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

Self Cite

View full text Add to dashboard Cite

This keynote paper deals with the durability of reinforced concrete (RC) structures exposed to aggressive environments characterized by high concentration of chloride ions, namely, marine environments or the use of de-icing salts. The mechanism of chloride-induced corrosion of steel in concrete is introduced, and its influence on the service life of RC structures is analyzed. Factors affecting the time to corrosion initiation are described with regard to both concrete properties and environmental exposure conditions. Design approaches available for achieving durability targets associated with the design service life are analyzed, focusing on studies carried out by the authors in recent years at the mCD Concrete Durability lab of Politecnico di Milano, which were aimed at improving the protection provided to the steel bars by the concrete cover, investigating the advantages of using corrosion-resistant stainless steel bars and developing the electrochemical technique of cathodic prevention.

show abstract

Throwing power of cathodic prevention applied by means of sacrificial anodes to partially submerged marine reinforced concrete piles: Results of numerical simulations

Cited by 60 publications

References 6 publications

Numerical Modeling of Initiation and Propagation of Corrosion in Hollow Submerged Marine Concrete Structures

Numerical Modeling of Initiation and Propagation of Corrosion in Hollow Submerged Marine Concrete Structures

Tidal Water Effect on the Hybrid Cathodic Protection Systems for Marine Concrete Structures

Corrosion of Steel in Concrete and Its Prevention in Aggressive Chloride-Bearing Environments

Contact Info

Product

Resources

About