Measurement Method for Macrocell Corrosion in Concrete Specimen using a Segmented Steel Bar

Miyazato, Shinichi; Otsuki, Nobuaki

doi:10.3151/jact.20.222

Cited by 3 publications

(4 citation statements)

References 35 publications

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“…However, the current flowing in the individual steel element was referred to as microcell corrosion current density. The summation of the anodic macrocell of an individual steel element and the microcell for that element was defined as total corrosion current density [7]. The polarization resistance was determined by the AC impedance method.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Performance Evaluation of Lithium Nitrite-Based Gel against Corrosion of Rebar with Partial Short Cover Depth in Chloride Environment

Khalid,

Miyazato,

Mizuguchi

et al. 2023

2023 IEEE 5th Eurasia Conference on Biomedical Engineering, Healthcare and Sustainability

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Section: Electrochemical Measurementmentioning

confidence: 99%

Performance Evaluation of Lithium Nitrite-Based Gel against Corrosion of Rebar with Partial Short Cover Depth in Chloride Environment

Khalid,

Miyazato,

Mizuguchi

et al. 2023

2023 IEEE 5th Eurasia Conference on Biomedical Engineering, Healthcare and Sustainability

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“…This provides the macrocell corrosion current density of a single steel element. [18,45]. The positive values of the macrocell corrosion current density are anodic macrocells, whereas the negative values of the macrocell are the cathodic macrocell corrosion current density.…”

Section: Macrocell Corrosion Current Densitymentioning

confidence: 99%

“…The total corrosion current density of a single steel element is the sum of the anodic macrocell current of a single element measured in Section 2.2.1.1 and the microcell current for the same element calculated from the polarization resistance in Section 2.2.1.3. [17,18].…”

Section: Maximum Total Corrosion Current Densitymentioning

confidence: 99%

“…During microcell corrosion, the cathodic and anodic areas coexist in close proximity. The sum of the anodic macrocell and microcell for a single steel element is called the total corrosion current density [17,18]. Therefore, the most important period under consideration is from construction to corrosion initiation, and timely intervention can increase the service life and durability of RC structures.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Silane and Silicate based Penetrants against Corrosion of Steel with Partial Cover Thickness

Khalid,

Miyazato,

Minato

et al. 2023

Civ Eng J

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The partial cover thickness of reinforced concrete structures near the coastline enhances the early corrosion onset, which reduces the service life. As a countermeasure under the preventive maintenance approach, to delay early corrosion onset in structures with partial cover thickness and increase durability throughout the service life, this study used silane and silicate-based surface penetrants. Mortar specimens with a partial cover thickness and embedded, specially segmented bars were prepared. Both penetrants were applied to specimens with partial cover thicknesses (20 and 7.5 mm). Further, electrochemical methods such as macrocell current, microcell current, electric resistivity, and potentiodynamic polarization curves were used to assess the corrosion resistance before and after coating. The penetration depth of silane was measured visually, and the Vickers hardness test was used for the silicate penetrant. The “equivalent cover approach” was adopted to evaluate the performance of penetrants throughout their service lives. Results revealed that the total corrosion current density decreased by 79% for specimens coated with silane and 52% for silicate penetrant, whereas no change was observed in the uncoated specimens. Based on the equivalent cover approach, the silane penetrant was determined to be most effective in delaying the corrosion onset and propagation time for cover thicknesses of 60 and 50 mm at 100 m distance against 70 mm, and for 40 and 30 mm against 50 mm at 250 m from the coastline. Further, the silicate-based penetrant was only effective for a deficient cover thickness of 5 mm against the specified cover thicknesses at a distance of 100 and 250 m from the sea coast. Doi: 10.28991/CEJ-2023-09-12-02 Full Text: PDF

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Influence of partial cover thickness and mortar quality on steel corrosion in a chloride environment

Khalid,

Shinichi

2024

Cogent Engineering

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Measurement Method for Macrocell Corrosion in Concrete Specimen using a Segmented Steel Bar

Cited by 3 publications

References 35 publications

Performance Evaluation of Lithium Nitrite-Based Gel against Corrosion of Rebar with Partial Short Cover Depth in Chloride Environment

Performance Evaluation of Lithium Nitrite-Based Gel against Corrosion of Rebar with Partial Short Cover Depth in Chloride Environment

Effect of Silane and Silicate based Penetrants against Corrosion of Steel with Partial Cover Thickness

Influence of partial cover thickness and mortar quality on steel corrosion in a chloride environment

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