Monitoring chloride-induced corrosion of carbon steel tendons in concrete using a multi-electrode system

Brenna, Andrea; Lazzari, Luciano; Ormellese, Marco

doi:10.1016/j.conbuildmat.2015.08.037

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…In embedded systems, the reference electrode is inserted in the concrete and is on the concrete surface in the case of portable systems, see Figure 3. In the first system, the connection to the reinforcement is made before concrete insertion, it being necessary that the steel is exposed to make the connection in the portable systems [21].…”

Section: Measurement Of Electrochemical Potentialmentioning

confidence: 99%

Degradation Monitoring Systems for a BIM Maintenance Approach

Romano¹,

Brito²

2019

Sustainable Construction and Building Materials

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Digitization allows to develop unprecedented technological systems based on the use of sensors, robotics, and automation. The construction industry is involved in this process of integrating new technologies through a platform called Building Information Modeling (BIM), which simplifies the management of the increasing complexity of construction processes. This methodology aims to create a global interactive system of information sharing between the different actors in the construction process. The integration of the processes creates economic and environmental opportunities, which can translate into increased efficiency of the sector. The information collected can be used throughout the construction lifecycle, which together with the monitoring of the buildings will support maintenance decisions. The monitoring of reinforced concrete structures with sensors allows the identification and quantification of the degradation processes, through the monitoring of several characteristic parameters of the reinforced concrete over time, and the determination of significant changes that indicate the existence of a degradative process in development. Obtaining this type of information, and its integration into BIM models, will allow intervention at an early stage in order to limit damages and costs associated with the maintenance of the structure, contributing to increase in the structure's useful life.

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Section: Measurement Of Electrochemical Potentialmentioning

confidence: 99%

Degradation Monitoring Systems for a BIM Maintenance Approach

Romano¹,

Brito²

2019

Sustainable Construction and Building Materials

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“…Although a lot of investigations have been conducted on the field measurements and mitigation of metro stray current interference suffered by buried pipeline, only a few research work studied the corrosion behavior and corrosion rate assessment method under dynamic DC stray current. [12][13][14][15][16] McCollum and Ahlborn [12] conducted a study in which iron samples were subjected to alternating and infrequently reversed current for different periods of time. The resulting corrosion was compared to corrosion produced by a steady-state DC of the same current density and discharge period.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that both the stray current density and the soil conductivity were the main factors affecting the corrosion rate, whereas the stray current frequency from 5 to 30 Hz contributed less to the corrosion rate. Brenna et al [14] carried out weight loss tests in the soil-simulating environment on cathodically protected carbon steel specimens by changing DC interference amplitude (0.1, 1, and 10 A/m 2 ) and the peak duration and they proposed that due to the alkalinity from oxygen reduction and hydrogen evolution reactions, the steel was under passive condition during the cathodic period, whereas within the anodic period, initially, the anodic reaction occurring on the metal caused the progressive neutralization of the electrolyte in contact with steel, resulting in the loss of passive condition of the steel, and then anodic corrosion occurred. Huo et al [15,16] adopted new electrochemical testing cells to conduct DC interference experiments and investigated the effects of potential excursions and pH variations on corrosion behavior.…”

Section: Introductionmentioning

confidence: 99%

Research on corrosion rate assessment of buried pipelines under dynamic metro stray current

Qin

Liu³

et al. 2021

Materials & Corrosion

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To provide a reference for the evaluation of corrosion rate under dynamic metro stray current, both simulated experiments in laboratory and coupon tests in the field were conducted to explore the corrosion behavior and the relationship between corrosion rates and dynamic DC interference parameters of buried pipelines. The results show that the dynamic period has a significant influence on the corrosion rate and the ratio of actual corrosion rate to the theoretical corrosion rate. The statistical data of pipe to soil potentials or current densities of coupons electrically connected to pipelines obtained from the field in many cities of China show that the dynamic fluctuation periods under metro stray current are within the range of 0–300 s, among which the majority of fluctuation periods distribute from 50 to 200 s. The dynamic fluctuation of pipe to soil potentials and current densities of coupons exhibits symmetric or asymmetric characteristics. Under the situation of symmetric positive and negative current density, the ratio of the actual corrosion rate to the theoretical corrosion rate ranges from about 4% to 22% under the typical dynamic periods range from 50 to 200 s based on the simulated experiments results in the laboratory. Besides, two corrosion rate assessment methods, including the positive shifting and time ratios of off‐potentials and symmetrical or asymmetric characteristics of DC current density of coupons were proposed. In addition, the evaluation of the on‐potential criteria to assess the corrosion risk of time‐variant anodic interference was also discussed in the paper.

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“…The specific feature of corrosion in concrete is that the anodic and cathodic sites are spatially localized due to the porous structure of the concrete [5], while the porosity of the concrete also affects the transport of the electrolyte and oxygen, determining the dynamics of the corrosion processes [27]. Therefore, certain new or upgraded methods were developed, enabling the continuous monitoring of corrosion [28][29][30][31]. One specific type of embedded sensor is the electrical resistance (ER) probe, which measures the thickness reduction due to corrosion [28].…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Corrosion of Steel in Concrete Exposed to a Marine Environment

2020

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Reinforced concrete structures require continuous monitoring and maintenance to prevent corrosion of the carbon steel reinforcement. In this work, concrete columns with carbon and stainless steel reinforcements were exposed to a real marine environment. In order to monitor the corrosion processes, two types of corrosion probes were embedded in these columns at different height levels. The results from the monitoring of the probes were compared to the actual corrosion damage in the different exposure zones. Electrical resistance (ER) probes and coupled multi-electrodes (CMEs) were shown to be promising methods for long-term corrosion monitoring in concrete. Correlations between the different exposure zones and the corrosion processes of the steel in the concrete were found. Macrocell corrosion properties and the distribution of the separated anodic/cathodic places on the steel in chloride-contaminated concrete were addressed as two of the key issues for understanding the corrosion mechanisms in such environments. The specific advantages and limitations of the tested measuring techniques for long-term corrosion monitoring were also indicated. The results of the measurements and the corrosion damage evaluation clearly confirmed that the tested stainless steels (AISI 304 and AISI 304L) in a chloride-contaminated environment behave significantly better than ordinary carbon steel, with corrosion rates from 110× to 9500× lower in the most severe (tidal) exposure conditions.

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Monitoring chloride-induced corrosion of carbon steel tendons in concrete using a multi-electrode system

Cited by 12 publications

References 23 publications

Degradation Monitoring Systems for a BIM Maintenance Approach

Degradation Monitoring Systems for a BIM Maintenance Approach

Research on corrosion rate assessment of buried pipelines under dynamic metro stray current

Monitoring the Corrosion of Steel in Concrete Exposed to a Marine Environment

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