Spatial variability of half-cell potential data from a reinforced concrete structure—a geostatistical analysis

Pfändler, Patrick; Keßler, Sylvia; Huber, Maximilian; Angst, Ueli

doi:10.1080/15732479.2022.2158204

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…For the sake of clarity, we assume the “corrosion potential” to be the value of the whole, short‐circuited reinforcement against the reference electrode. This value is comparable to potential values from half‐cell potential mapping, [ 31–35 ] with the difference of measuring the half‐cell potential within the concrete and not on its surface. The term “resting potential” is used synonymously to “equilibrium potential” and “fully depolarized open circuit potential,” whereby the term “free corrosion potential” describes the transient value of potential between closed circuit and resting potential of each decoupled electrode‐like anode or cathode.…”

Section: Electro/‐chemical Prerequisites For Rebar Corrosionsupporting

confidence: 77%

Carbon steel electrodes within chloride induced reinforcement corrosion in cracked concrete: Approximation to deterministic system response

Zausinger,

Müller,

Gilch

et al. 2023

Materials & Corrosion

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Research on chloride‐induced corrosion in cracked, reinforced concrete is of steady economic and scientific importance. The ever‐growing amount of reinforced concrete structures in need for maintenance and preservation calls for suitable and reliable methods to assess the current state. The present study demonstrates a specimen design that allows authentic corrosion monitoring, including solely carbon mild steel as working and counter electrodes, singularly cracked concrete as electrolytes and a conservative dismantling of the anodic steel‐concrete interface (SCI) at the end of 180 days of monitoring. The electrochemical features of the evolved specimen narrow down to the textbook behavior of the investigated electrodes according to the electro potential series of metals. The most prominent results are the chloride profiles at depth of rebar along the SCI, the build‐up of driving potential, and the decisive contribution arising from the anodic equilibrium potential. Accordingly, future repair methods should always include observation of the anodic equilibrium potential and their effectiveness is clearly addressed in the course of that value.

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Section: Electro/‐chemical Prerequisites For Rebar Corrosionsupporting

confidence: 77%

Carbon steel electrodes within chloride induced reinforcement corrosion in cracked concrete: Approximation to deterministic system response

Zausinger,

Müller,

Gilch

et al. 2023

Materials & Corrosion

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“…For the electrochemical techniques, cubic molds with the dimensions shown in Figure 5 were prepared as follows: The half-cell potential (HCP) is a non-destructive method to measure the probability of corrosion on the metal surface and is interpreted with the parameters of the ASTM C-876-09 standard [45]. The operating principle of the HCP is that the electrical activity of the steel reinforcement and the concrete, considering the steel as an electrode and the concrete as an electrolyte, show a different electrochemical potential, resulting in detectable potential gradients at the surface of the concrete, which is measured and recorded as corrosion potential (Ecorr) [46,47]. The result is interpreted as the possibility of corrosion at a certain location of the concrete but cannot be used to firmly state the corrosion profile itself, such as the location, size, and shape of corrosion [48].…”

Section: Specimen Preparationmentioning

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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On-line monitoring the corrosion rate of reinforcing steel in concrete under natural conditions using bimetallic batch sensors along the coast of Khanh Hoa (Vietnam)

Linh¹,

Shevtsov

Зарцын

et al. 2023

Arabian Journal of Chemistry

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Spatial variability of half-cell potential data from a reinforced concrete structure—a geostatistical analysis

Cited by 3 publications

References 46 publications

Carbon steel electrodes within chloride induced reinforcement corrosion in cracked concrete: Approximation to deterministic system response

Carbon steel electrodes within chloride induced reinforcement corrosion in cracked concrete: Approximation to deterministic system response

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

On-line monitoring the corrosion rate of reinforcing steel in concrete under natural conditions using bimetallic batch sensors along the coast of Khanh Hoa (Vietnam)

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