Determination of rust formation to cracking at the steel–concrete interface by corrosion of steel in concrete

Hwang, Woongik; Ann, Ki Yong

doi:10.1016/j.conbuildmat.2022.130215

Cited by 11 publications

(1 citation statement)

References 19 publications

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“…The corrosion of a steel reinforcement can lead to structural failure, weakening the overall integrity of the concrete. As time passes, this corrosion can spread, causing the concrete to crack and crumble [10][11][12]. To prevent such structural decay, it is crucial to quantitatively characterize the passivation process of steel reinforcement in concrete.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Characterization of Passivation Process of Steel Reinforcement in Concrete towards Durability against Anticorrosion Based on Electrochemical Methods

Lv,

Liu,

Miao

et al. 2024

Applied Sciences

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The passivation behavior of steel reinforcements in concrete is significantly influenced by the environment, concrete pore solution, and the passive film formed on the steel surface. The present study used electrochemical methods to successfully characterize the passivation process of steel reinforcements in concrete. The passivation behavior of commonly used HRB400 steel reinforcement material in concrete was studied using various electrochemical parameters quantitatively. As the soaking test time increased, the OCP gradually increased and stabilized after 5 days, indicating that the steel electrode transitioned from an active state to a passive state in the simulated liquid environment of concrete. The steel reinforcement developed a protective passive film that reduced its tendency to corrode. According to EIS, after soaking for one day, the steel electrode showed significant early passivation, indicated by an increase in its arc diameter. The WE arc gradually increased in the first 5 days of immersion, suggesting dynamic passive film formation and development. Beyond 5 days, the passive film stabilized with minimal further changes in its impedance spectrum, indicating carbon steel electrode passivation. The working electrode’s impedance increased significantly on the fifth day, and gradually increased slightly after 10 days, indicating comprehensive coverage by the oxide film. Attributed to the growth and development of the oxide film, the electrode resistance reached a relatively stable state after the fifth day. The shift in corrosion potential offers an indication of the level of passivation of the steel reinforcements. The decrease in the anode Tafel slope and increase in the corrosion potential indicate the formation and stabilization of an oxide film on the steel surface, which is beneficial for its long-term durability in concrete structures. By analyzing the OCP, EIS, and dynamic potential polarization curve method data, it is possible to gain insights into the passivation behavior of steel reinforcements in concrete structures. This study aims to provide a basis for optimizing the corrosion protection of steel reinforcements in concrete structures. The significance of this study lies in a deep understanding of the passivation behavior of steel bars in concrete, providing a theoretical basis for improving the durability and lifespan of steel bars in concrete structures.

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Section: Introductionmentioning

confidence: 99%

Quantitative Characterization of Passivation Process of Steel Reinforcement in Concrete towards Durability against Anticorrosion Based on Electrochemical Methods

Lv,

Liu,

Miao

et al. 2024

Applied Sciences

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Enhanced Intrinsic Self‐Healing Performance of Mussel Inspired Coating via In‐Situ Cation Capture

Li,

Tong,

et al. 2024

Small

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Under damp or aquatic conditions, the corrosion products deposited on micro‐cracks/pore sites bring about the failure of intrinsically healable organic coatings. Inspired by mussels, a composite coating of poly (methyl methacrylate‐co‐butyl acylate‐co‐dopamine acrylamide)/phenylalanine‐functionalized boron nitride (PMBD/BN‐Phe) is successfully prepared on the reinforcing steel, which exhibits excellent anti‐corrosion and underwater self‐healing capabilities. The self‐healing property of PMBD is derived from the synergistic effect of hydrogen bonding and metal‐ligand coordination bonding, and thereby the continuous generation of corrosion products can be significantly suppressed through in situ capture of cations by the catechol group. Furthermore, the corrosion protection ability can be remarkably improved by the labyrinth effect of BN and the inhibition role of Phe, and the desired interfacial compatibility can be formed by the hydrogen bonds between BN‐Phe and PMBD matrix. The corrosion current density (icorr) of PMBD/BN‐Phe coating is determined as 7.95 × 10−11 A cm−2. The low‐frequency impedance modulus (|Z|f = 0.01 Hz is remained at 3.47 × 109 Ω cm2, indicating an ultra‐high self‐healing efficiency (≈89.5%). It is anticipated to provide a unique strategy for development of an underwater self‐healing coating and robust durability for application in anti‐corrosion engineering of marine buildings.

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The structural assessment for concrete structure on the onset of cracking with respect to steel corrosion

Choi,

Hwang,

Ann

2024

Applied Ocean Research

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Determination of rust formation to cracking at the steel–concrete interface by corrosion of steel in concrete

Cited by 11 publications

References 19 publications

Quantitative Characterization of Passivation Process of Steel Reinforcement in Concrete towards Durability against Anticorrosion Based on Electrochemical Methods

Quantitative Characterization of Passivation Process of Steel Reinforcement in Concrete towards Durability against Anticorrosion Based on Electrochemical Methods

Enhanced Intrinsic Self‐Healing Performance of Mussel Inspired Coating via In‐Situ Cation Capture

The structural assessment for concrete structure on the onset of cracking with respect to steel corrosion

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