Improving half-cell potential survey through computational inverse analysis for quantitative corrosion profiling

Adriman, Ramzi; Ibrahim, Israr Bin M.; Huzni, Syifaul; Fonna, Syarizal; Ariffin, Ahmad Kamal

doi:10.1016/j.cscm.2021.e00854

Cited by 11 publications

(12 citation statements)

References 32 publications

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“…• Second, to ensure that corrosion predictions are relevant and useful for the engineering community, there is a need to spend more effort on the quantification of corrosion rate, in particular the temporospatial variability of corrosion rates in a structure. We see opportunities in methods for the in situ measurement of corrosion rate as well as in modeling, as outlined below: • Reliably measuring the corrosion rate of localized corrosion in concrete structures can be achieved by combining refined electrochemical measurements with numerical models, [129][130][131][132][133][134] taking advantage of the progress in computational power and mechanistic understanding made over the last decades. In addition to nondestructive techniques for on-site measurements, the potential benefit from monitoring techniques, particularly their ability to create large amounts of time-and space-resolved data, is huge.…”

Section: Discussionmentioning

confidence: 99%

Beyond the chloride threshold concept for predicting corrosion of steel in concrete

Angst

Isgor

Hansson

et al. 2022

Applied Physics Reviews

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All existing models to forecast the corrosion performance of reinforced concrete structures exposed to chloride environments are based on one common theoretical concept, namely, a chloride threshold, as a sharply defined trigger for corrosion, followed by a period of active corrosion. We critically review the resulting treatment of corrosion initiation and propagation as two distinct, successive stages. We conclude that this concept presents a major barrier for developing reliable corrosion forecast models, and that a new approach is needed. In reality, steel corrosion in concrete is a continuous process, that is, rarely separable into uncoupled, sequential phases. We propose that the focus be placed on the quantification of the time- and space-variant corrosion rate from the moment steel is placed in concrete until it reaches the end of the service life. To achieve this, a multi-scale and multi-disciplinary approach is required to combine the scientific and practical contributions from materials science, corrosion science, cement/concrete research, and structural engineering.

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Section: Discussionmentioning

confidence: 99%

Beyond the chloride threshold concept for predicting corrosion of steel in concrete

Angst

Isgor

Hansson

et al. 2022

Applied Physics Reviews

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“…The application and implementation procedure are described in the ASTM C876 code of practice [5]. Work associated with this technique for evaluating the probability of rebar corrosion is reported in [6,7].…”

Section: Introductionmentioning

confidence: 99%

Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

2023

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Corrosion in reinforced concrete (RC) structures is associated with a reduction of the rebar diameter, loss of interfacial bond, cracking, and eventual spalling and probable collapse of the structure. The negative effects of corrosion on structural safety, durability, and longevity imposes significant costs on the national economy. Therefore, planned non-destructive testing (NDT) of concrete structures is essential to enhance the safety and economic sustainability of infrastructure. Previous work by the research group has established the capability of the ultrasonic Synthetic Aperture Focusing Technique (SAFT) as a tool for detection of rebar corrosion. This work extends the previous research towards application of statistical learning for ascertaining the corrosion severity through analysis of SAFT images of the rebar. Using features extracted from images, a Gaussian mixture model (GMM) is implemented to classify the severity of corrosion damage to the rebar. The results from the research positively demonstrate the potential of the proposed technique as an enabler for decisions pertaining to maintenance and timely repair of concrete infrastructural assets.

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“…It measures the value of potential on the surface of concrete members where the positive pole of the high-impedance volumeter is electrically attached to the reinforcing steel and the other pole is attached to a reference electrode. The measured potential is then translated into the risk of corrosion of embedded steel inside the RC members [1,19]. Table 1 shows the criteria followed to interpret the potential values for corrosion detection.…”

Section: Introductionmentioning

confidence: 99%

“…According to these studies, a strong correlation between the half-cell potential measurements and the corrosion level was observed; however, they did not link the half-cell potential measurements to the performance degradation level of corrosion-damaged members. Adriman et al [19] showed, using a case study, that a half-cell potential test augmented with computational approaches is a promising method to improve the diagnosis of corrosion in RC members. Thus, Adriman et al [19] demonstrated that half-cell potential measurements can be used beyond the qualitative corrosion risk assessment established by the ASTM C876 [18] (see Table 1).…”

Section: Introductionmentioning

confidence: 99%

“…Adriman et al [19] showed, using a case study, that a half-cell potential test augmented with computational approaches is a promising method to improve the diagnosis of corrosion in RC members. Thus, Adriman et al [19] demonstrated that half-cell potential measurements can be used beyond the qualitative corrosion risk assessment established by the ASTM C876 [18] (see Table 1).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Half-Cell Potential Measurements for Reinforced Concrete Corrosion

2022

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The evaluation of half-cell potential measurements in reinforced concrete (RC) members can be a key issue for civil engineers. The primary reason for this is that the interpretation of half-cell potential measurements based on the available standards provides information related only to the possibility of corrosion in concrete, but it does not provide a clear perception of the influence of corrosion on the capacity of the RC members. The objective of this study is two-fold: (1) to explore the influence of corrosion level on the flexural capacity of RC members; and (2) to provide engineers with a better understanding of the correlation between half-cell potential measurements and flexural capacity of RC members. To establish this, twelve RC beams were cast and then exposed to accelerated corrosion utilizing an impressed current. After that, half-cell potential tests were performed on the entire surface of the beams. Next, a four-point loading test was performed on the beams to determine their flexural behavior. The analysis of measurements showed that there is a high positive correlation between the half-cell potential measurements and the flexural capacity of the tested beams which demonstrates the potential of half-cell measurements to predict the capacity degradation level of the RC beams due to corrosion.

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Improving half-cell potential survey through computational inverse analysis for quantitative corrosion profiling

Cited by 11 publications

References 32 publications

Beyond the chloride threshold concept for predicting corrosion of steel in concrete

Beyond the chloride threshold concept for predicting corrosion of steel in concrete

Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

Evaluation of Half-Cell Potential Measurements for Reinforced Concrete Corrosion

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