Propagation of steel corrosion in concrete: Experimental and numerical investigations

Michel, Alexander; Otieno, Mike; Stang, Henrik; Geiker, Mette Rica

doi:10.1016/j.cemconcomp.2016.04.007

Cited by 81 publications

(35 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Further, it can be noted that combined criteria where the corrosion current is involved are globally not satisfactory. The threshold value of 0.1 μA/cm 2 is, however, recognized as being the transition point from passive to active corrosion and is used for calibrating impressed direct current in experimental investigations . The assumptions of a charge transfer process and uniform corrosion allowing Equation and to be established are probably not fully realistic.…”

Section: Results and Analysismentioning

confidence: 99%

“…Fitting the steel polarization curve is a usual and convenient way to estimate the Tafel coefficients, but other electrochemical results can also be used, in combination with modeling. In Michel et al the experimental corrosion current

i_{co rr}

, derived from the polarization resistance, and corrosion potential

E_{corr}

were targeted in a fitting procedure where comprehensive finite element modeling of the experiment was proposed. Tafel coefficients were adjusted so that the computed values of

i_{corr}

and

E_{corr}

matched experimental values.…”

Section: Assessment Of the Tafel Coefficientsmentioning

confidence: 99%

“…The second approach is supported by Ohm's law together with the conservation of electrical charge according to Laplace's law and Butler–Volmer's equations as electrical boundary conditions at the steel surface . The reduction of oxygen at the cathode is also taken into account by the limiting corrosion current density at the cathode . Finally, some authors have proposed to combine these approaches by taking account of the oxygen flow at both cathode and anode .…”

Section: Introductionmentioning

confidence: 99%

“…Numerous values of Tafel constants are collected and reported in . Many of them were proposed in a modeling framework and none of them was the outcome of an experimental investigation devoted to carbonation‐induced corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…Some specimens were intentionally precracked or cracked during the development of corrosion. According to Michel et al, these diverse experimental factors or situations contribute to the width of ranges of Tafel constants proposed in the literature. Other factors affecting the Tafel slopes can be encountered in the phenomenon of corrosion itself, as mentioned by Babaee and Castel from previous studies: Conductivity, pH and ionic composition of the electrolyte, polarization mechanism, corrosion potential, surface film of mill scale covering the surface of the reinforcement.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Quantification of Tafel coefficients according to passive/active state of steel carbonation‐induced corrosion in concrete

Duprat

Larrard

2019

Materials & Corrosion

View full text Add to dashboard Cite

Statistical quantification of Tafel coefficients is investigated in this study for isolated steel rebar embedded in concrete. The survey is supported by a wide experimental campaign carried out earlier to characterize the passive and active states of carbonation‐induced corrosion of steel. Electrochemical measurements (polarization resistance, corrosion potential, Tafel coefficients) and gravimetric estimations of iron loss were regularly conducted over 417 days on 108 concrete specimens. The statistical analysis reveals that the mean value of Tafel coefficients, both cathodic and anodic, is higher under active corrosion, which seems to contradict the general tendency found for chloride‐induced corrosion, while their coefficient of variation is smaller. The statistical inference was based on the first step of distributions fitting the experimental data and then on the second step of goodness‐of‐fit tests. The most suitable of the distributions proposed were the Burr, Rayleigh, and Gamma distributions. A similar analysis was made for the corrosion potential and polarization resistance. The findings of the study will be valuable for probabilistic approaches to corrosion where probabilistic distributions are required.

show abstract

Section: Results and Analysismentioning

confidence: 99%

i_{co rr}

, derived from the polarization resistance, and corrosion potential

E_{corr}

were targeted in a fitting procedure where comprehensive finite element modeling of the experiment was proposed. Tafel coefficients were adjusted so that the computed values of

i_{corr}

and

E_{corr}

matched experimental values.…”

Section: Assessment Of the Tafel Coefficientsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quantification of Tafel coefficients according to passive/active state of steel carbonation‐induced corrosion in concrete

Duprat

Larrard

2019

Materials & Corrosion

View full text Add to dashboard Cite

show abstract

Energy efficient shelter for displaced persons: towards sustainable camps

Al‐Atrash,

Hamdan,

Mualla

2023

Bauphysik

View full text Add to dashboard Cite

The presented research addresses shortcomings in refugee camps in Jordan where humanitarian needs cannot be fully met. It provides an overview of significance of sustainability in shelter design and aims to rethink the future design process by giving more consideration to site factors of the camp area. It also describes the use of simulation programmes to create a well‐designed shelter module. The study focuses on the construction of energy‐efficient shelters for displaced persons in the region, with an emphasis on improving the indoor climate and reducing energy consumption. To answer the research question, hybrid data systems were used for two purposes: first, to identify the design factors associated with refugee shelter design, and second, to categorise these factors and incorporate them into the simulation to get the ideal module design. The simulation software SIM VICUS was used. As a result, basalt is proposed to be used for the design of new refugee shelters in Jordan. The basalt fibre panel as a construction material gives very good results for achieving sufficient indoor thermal comfort for the shelters. With the proposed design, the maximum indoor temperature in the hot season can be limited to 29.2 °C, with a difference of 10.8 K. In the cold season, the indoor temperature was low. In the cold season, the lowest indoor temperatures were 11.4 °C with a difference of 12.7 K.

show abstract

Electrochemical corrosion parameters for active and passive reinforcing steel in carbonated and sound concrete

Sohail

Laurens

Deby

et al. 2021

Materials & Corrosion

View full text Add to dashboard Cite

The electrochemical corrosion parameters, such as corrosion potential, corrosion current density, and the Tafel constants are necessary inputs for the corrosion modeling in reinforced concrete. Literature shows large variability in their values, whereas the data are scarce for the carbonated concrete. This paper presents a range of corrosion parameters for the active steel in carbonated and the passive steel in noncarbonated concrete. Forty-eight singly reinforced concrete cylinders were cast, of which 24 were carbonated and the others were sound samples. Potentiodynamic polarization curves were obtained at three different scan rates and extrapolated to extract the corrosion parameters. To validate these parameters, a macrocell corrosion system was simulated using FEM-based Comsol multiphysics® software. The numerical results were compared to two experimental studies. A natural dispersion in the values of corrosion parameters for both active and passive steels was observed.The average Stern-Geary constant was 54 and 47 mV for active and passive steels, respectively. Numerical simulations with the obtained parameters predicted the macrocell corrosion in partially carbonated concrete with a high accuracy. The presented values of corrosion parameters in this study could help researchers and engineers to simulate the corrosion phenomena in concrete accurately.carbonation of concrete, corrosion parameters, numerical modeling of corrosion, reinforcement corrosion in concrete, Tafel plots | INTRODUCTIONCorrosion in reinforced concrete (RC) has become a significant cause of the deterioration of civil infrastructure and a massive burden on the global economy. Although, the concrete cover provides physical and chemical protection to the rebar thanks to its basic pH (~13), which enables a passive layer at reinforcement and hinders corrosion. [1,2] However, carbonation in concrete lowers the pH below 9, which destroys the passive layer and initiates the corrosion process. Corrosion initiation in RC structures takes several years, and the artificially This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Propagation of steel corrosion in concrete: Experimental and numerical investigations

Cited by 81 publications

References 23 publications

Quantification of Tafel coefficients according to passive/active state of steel carbonation‐induced corrosion in concrete

Quantification of Tafel coefficients according to passive/active state of steel carbonation‐induced corrosion in concrete

Energy efficient shelter for displaced persons: towards sustainable camps

Electrochemical corrosion parameters for active and passive reinforcing steel in carbonated and sound concrete

Contact Info

Product

Resources

About