Evaluation of the Corrosion Behavior of Reinforced Concrete with an Inhibitor by Electrochemical Impedance Spectroscopy

Park, Jang-Hyun; Jung, MyeongGyu

doi:10.3390/ma14195508

Cited by 11 publications

(8 citation statements)

References 30 publications

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“…Figure 17 shows the results of the Bode phase plots. At high frequencies, the impedance can be used to determine the resistance of the electrolyte or concrete solution Rs based on the electrode reaction time, and at medium and low frequencies, depolarization resistance to the steel rebar and polarization due to diffusion and movement of substances [81]. It can be observed that immersion at 24 h (Figure 17a), in the low-frequency region, high values of the impedance modulus between 1 × 10 6 and 1 × 10 7 Ω•cm 2 were obtained for the CO and CH-04 specimens.…”

Section: Electrochemical Impedance Spectroscopy Measurementsmentioning

confidence: 99%

Influence of Recycled High-Density Polyethylene Fibers on the Mechanical and Electrochemical Properties of Reinforced Concrete

Flores Nicolás,

Menchaca Campos,

Flores Nicolás

et al. 2024

Fibers

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The quantity of different plastics generated after consumption is an impact factor affecting the environment, and the lack of recycling generates solid waste. The purpose of this work is to incorporate high-density recycled polyethylene fibers (HDPE) for possible use as concrete reinforcement. Physical and mechanical properties from recycled fibers were analyzed, such as density, absorption, and stress resistance, as well as workability, air content, porosity, concrete compression, and flexural strength properties. Samples were prepared with a low fiber content of 0.2% and 0.4%, as a substitution for sand weight, and lengths of 10 and 30 mm. To study corrosion phenomena, the specimens were exposed to a saline environment containing 3% sodium chloride for 365 days, and the electrochemical techniques including half-cell potential (HCP), electrochemical noise (EN), linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) were applied. The results showed a 4.8% increase in compressive strength with a low fiber percentage and short geometries, while flexural strength increased marginally by 2.3% with small quantities of HDPE fibers. All these factors contribute to greater material durability, less permeability, and crack control. A positive effect of fibers with short dimensions on the corrosion processes of a steel bar was observed, with the fibers acting as a physical barrier against the diffusion of chloride ions.

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Section: Electrochemical Impedance Spectroscopy Measurementsmentioning

confidence: 99%

Influence of Recycled High-Density Polyethylene Fibers on the Mechanical and Electrochemical Properties of Reinforced Concrete

Flores Nicolás,

Menchaca Campos,

Flores Nicolás

et al. 2024

Fibers

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“…The density of the dry concrete samples was measured to be ca 2.13 g/cm 3 , with open porosity of ca 19 %. After the curing of the samples, scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterizations were performed.…”

Section: Xrd and Sem Characterization Of The Concrete Samplesmentioning

confidence: 99%

“…In the case of the impedance spectroscopy of concretes, the main complication in the data analysis arises due to the contribution of the electrode/concrete interface to the AC response. [1,2] In fact, most of the reports in the field are related to the investigation of the corrosion of steel inside concrete samples (see, e. g. [3] ). Neither two-electrode nor three-electrode configurations eliminate such a contribution, which is challenging to model, and often only empirical models are used.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Interpretation of Responses of Concretes in Four‐Probe Impedance Measurements

Bandarenka,

Bandarenka

2024

ChemElectroChem

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Typically, a detailed non‐destructive characterization and quality assessment of concretes under “real‐world”, for example, road conditions, are complicated. Impedance spectroscopy is a powerful technique for obtaining insights into concrete property changes during its usage in various environments. However, interpreting and analyzing impedance responses can be challenging due to the lack of explicit physical impedance models of different concretes. In this work, we have elaborated and verified such a model for the so‐called four‐electrode impedance measurements for dry materials and concrete exposed to aqueous K2SO4 solutions, which can cause concrete corrosion. A differential impedance analysis, which does not use any preliminary model assumption, suggested the elements′ presence originating from different types of pores and the contribution of the grain boundary capacitance. Based on this information, the equivalent circuit model was constructed using rules typical in solid‐state ionics and verified by fitting the impedance data to the model; and its parameter changes after adding the K2SO4 solutions were analyzed. The model demonstrated excellent agreement with the measured spectra. Its parameter changes generally agree with the expected behavior of the concrete samples in the corrosive environment. Possible applications of such impedance analysis are briefly discussed.

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“…The state of most reinforced concrete buildings and products dating back to the first decades of the 20th century confirms a sufficient degree of material durability [1][2][3][4][5][6][7]. However, during a detailed examination of the structures in operation, both local [8][9][10] and significant defects were found to be caused mainly by various corrosion processes [11,12]. In Refs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrochemical Corrosion on the Properties of Modified Concrete

Gordina

Gumenyuk

Polyanskikh

et al. 2023

Construction Materials

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Analysis of the use of reinforced concrete structures confirmed the destruction of reinforced products based on Portland cement due to stray currents, which makes it impossible to achieve the required durability and reliability of structures. The present work shows the results of a study on the diffusion permeability of samples with different degrees of electrical conductivity. The relative value of the electrode potential was measured by the open circuit potential method. The novelty of this work is its analysis of the quantitative and qualitative characteristics of the structure of the mineral matrix with specified electrical properties after long-term exposure to electrochemical corrosion. In this work, an assessment was carried out, for the first time, on the effects of electrochemical corrosion on modified composites with predominantly electrically conductive and electrically insulating properties. An increase in the electrical conductivity of the composite was found to reduce the potential difference. The use of such composites helped protect the reinforcement from electrochemical corrosion.

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Evaluation of the Corrosion Behavior of Reinforced Concrete with an Inhibitor by Electrochemical Impedance Spectroscopy

Cited by 11 publications

References 30 publications

Influence of Recycled High-Density Polyethylene Fibers on the Mechanical and Electrochemical Properties of Reinforced Concrete

Influence of Recycled High-Density Polyethylene Fibers on the Mechanical and Electrochemical Properties of Reinforced Concrete

Modeling and Interpretation of Responses of Concretes in Four‐Probe Impedance Measurements

Effect of Electrochemical Corrosion on the Properties of Modified Concrete

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