Simulation of Steel Corrosion in Concrete Based on the Model of Macro-Cell Corrosion Circuit

Maruya, Tsuyoshi; Takeda, Hitoshi; Horiguchi, Kenichi; Koyama, Satoru; Hsu, Kai‐Lin

doi:10.2208/jsceje.62.757

Cited by 4 publications

(6 citation statements)

References 12 publications

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“…In order to distinguish the microcell corrosion current density and the macrocell corrosion current density and to better understand the relationship between them, the corrosion current density of steel in the disconnected periods was defined as the microcell corrosion current density of steel [3,[9][10][11]. It was calculated by the use of the Stern-Geary equation: mi = / , where was the resistance of steel and was a constant which was commonly considered to be 26 mV for steel in corroded state and 52 mV for steel in passive state.…”

Section: Methodsmentioning

confidence: 99%

“…The macrocell polarization slope of the cathode (anode) had been defined in the macrocell corrosion model proposed by Maruya et al [9] as shown in Figure 10. The macrocell polarization slope of cathode was marked as ma-c , while the macrocell polarization slope of anode was marked as ma-a .…”

Section: Effect Of Water-cement Ratios On the Macrocell Polarization mentioning

confidence: 99%

“…The higher the ma-c , the stronger the ability of the cathode to receive the electrons, which means the lower macrocell polarization resistance of the cathode. The lower the ma-a , the stronger Higher Figure 10: Definition of macrocell polarization slope of cathode and anode [9]. the ability of anode to produce the electrons, which results in a lower macrocell polarization resistance of the anode.…”

Section: Effect Of Water-cement Ratios On the Macrocell Polarization mentioning

confidence: 99%

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Effect of Water-Cement Ratio on the Macrocell Polarization Behavior of Reinforcing Steel

Cao

Hibino

Goda

2014

Journal of Engineering

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The effect of water-cement ratio on the macrocell polarization behavior of reinforcing steel embedded in cement mortars was investigated by comparing and analyzing the macrocell polarization ratios and slopes of anodic and cathodic steels. Based on the experimental results, the relationship between macrocell potential difference and macrocell current density was also analyzed, and the mechanism of macrocell polarization affected by water-cement ratio was proposed. The results indicated that the water-cement ratios had little impact on the macrocell polarization ratios of cathode and anode. The lower water-cement ratio could reduce the macrocell current by decreasing the macrocell potential difference and increasing the macrocell polarization resistance of the cathode and anode.

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Section: Methodsmentioning

confidence: 99%

Section: Effect Of Water-cement Ratios On the Macrocell Polarization mentioning

confidence: 99%

Section: Effect Of Water-cement Ratios On the Macrocell Polarization mentioning

confidence: 99%

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Effect of Water-Cement Ratio on the Macrocell Polarization Behavior of Reinforcing Steel

Cao

Hibino

Goda

2014

Journal of Engineering

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“…The macrocell formation in patch repairs can be theoretically explained using a macrocell model circuit (Maruya, Takeda, Horiguchi, Koyama, & Hsu, 2007). When there are a number of anodic and cathodic sites created because of an electrochemical potential difference such as in the case of a patch repair, the microcell corrosion alone cannot explain the whole process.…”

Section: Macrocell Corrosionmentioning

confidence: 99%

Performance of Concrete Patch Repairs: From a Durability Point of View

Eldho¹,

Nanayakkar²,

Xia³

et al. 2016

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

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Chloride contamination in reinforced concrete leads to the corrosion of steel bars. Concrete patch repairs are widely practiced as a remedial measure for the mitigation of such corrosion in reinforced concrete structures. The performance of the patch repairs was studied by various researchers in the past. The structural and material aspects of patch repairs have received more attention than the electrochemical consequences of patch repairs in past studies. But electrochemical changes could be the underlying cause for the failure of many patch repairs. This paper reviews the performance of patch repairs from a durability point of view. It covers the formation of incipient anodes, which are the new corrosion sites formed after a patch repair process. The prevailing corrosion mechanism at the incipient anodes is discussed. The performance of patch repairs when modified with corrosion inhibitors and sacrificial anodes is examined. The importance of the selection of repair materials from a durability point is highlighted considering the electrochemical consequences of patch repair.

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“…Re-deterioration within the not-yet-repaired area around the patched area is known to occur in existing structures. Some prediction methods of this phenomenon have been proposed by some previous studies (Miyazato et al 2001;Maruya et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Influence of Patch Repair Material on Electrochemical Desalination of Concrete

Minagawa

Hisada

2010

ACT

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This study experimentally examined the influence of patch repair materials on the electrochemical desalination method for reinforced concrete. The experimental parameters are the electrical resistivity and the repair area ratio of the patch repair materials. The evaluation items were the amount of desalination and the current density distribution at the surface of the rebar. In addition, an assessment method to estimate the amount of desalination by using core samples obtained from an existing member was proposed. Experiment results showed that the current density at the surface of a rebar increased near the boundary between the patch repair material and the concrete, and that the distribution of current density depended on the electrical resistivity and the repair area ratio of the patch repair materials. Moreover, the amount of desalination increased as the electrical resistivity of patch repair materials increased.

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Simulation of Steel Corrosion in Concrete Based on the Model of Macro-Cell Corrosion Circuit

Cited by 4 publications

References 12 publications

Effect of Water-Cement Ratio on the Macrocell Polarization Behavior of Reinforcing Steel

Effect of Water-Cement Ratio on the Macrocell Polarization Behavior of Reinforcing Steel

Performance of Concrete Patch Repairs: From a Durability Point of View

Influence of Patch Repair Material on Electrochemical Desalination of Concrete

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