Steel corrosion in concrete: Determinist modeling of cathodic reaction as a function of water saturation degree

Huet, Bruno; L’Hostis, Valérie; Santarini, G.; Féron, Damien; Idrissi, Hassane

doi:10.1016/j.corsci.2006.10.005

Cited by 75 publications

(51 citation statements)

References 21 publications

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“…These results suggest that corrosion reactions taking place on steel surfaces change drastically at around neutral pH. These results coincide with those by Heut et al, who reported a transition from passive to active corrosion of steel in carbonated concrete at pH between 9.4 and 10 11) . Similarly, as reported by Davies et al, carbon steel forms a pseudo-passive Fe(OH) 2 and/or FeCO 3 layer during anodic polarization in bicarbonate solution through the following reactions 12,13) :…”

Section: Steel Corrosion In Neutral and Weak Alkaline Solutionssupporting

confidence: 82%

Effect of pH on Hydrogen Absorption into Steel in Neutral and Alkaline Solutions

et al. 2017

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The corrosion behavior and the amount of absorbed hydrogen in steel were investigated in neutral and alkaline solutions with pH values ranging from 8.3 to 12.4. The amount of absorbed hydrogen into steel during immersion in the solutions was evaluated by thermal desorption analysis. In the alkaline solution of pH 12.4, the steel maintained a noble potential in a passive state, and almost no hydrogen absorption into the steel was detected. However, as the pH moved towards a more neutral pH, the corrosion potential shifted in the less noble direction, and the amount of hydrogen absorbed increased dramatically. These results indicate that the steel surface became more active in the neutral solutions, and the hydrogen evolution reaction, one of the cathodic reactions of steel corrosion, was enhanced close to the neutral pH with decreasing corrosion potential in the less noble direction. The change of the surface state from passive to active with decreasing pH accelerated the anodic dissolution of steel and made the corrosion potential less noble, resulting in the enhancement of hydrogen evolution and absorption reactions on the steel.

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Section: Steel Corrosion In Neutral and Weak Alkaline Solutionssupporting

confidence: 82%

Effect of pH on Hydrogen Absorption into Steel in Neutral and Alkaline Solutions

et al. 2017

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“…They are the basis of a model [9] based on the behaviour (transport and reduction) of oxygen in the binder/DPL system. In order to validate this approach on contemporary concretes, samples have been taken on French historical buildings.…”

Section: Introductionmentioning

confidence: 99%

Characterization of long‐term corrosion of rebars embedded in concretes sampled on French historical buildings aged from 50 to 80 years

L’Hostis

Neff

Bellot‐Gurlet

et al. 2009

Materials & Corrosion

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International audienceThe aim of this paper is to understand what the chemical influence of the concrete on the corrosion form present is, on rebars embedded for tens or hundreds years. Therefore, metal/concrete interface of samples coming from two French Historical Monuments has been characterized: ‘Bourse du Travail’, Bordeaux, 80 years old and ‘Maison du Brésil de la Cité Internationale de Paris’, 50 years old. The collected samples have been observed on transverse section in order to observe the whole corrosion system (metal/corrosion products/concrete). Morphology, elementary composition and structure have been studied with complementary analytical approaches (optical microscope, scanning electron microscope coupled to energy dispersive spectroscopy and Raman microspectroscopy). Thus, a fine description of the corrosion scales formed on the metallic rebars can be schematized. On the basis of these results, mechanisms hypotheses are proposed in the discussion

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“…(b) The presence of a dense, lime rich layer of hydration prod ucts in the steel concrete interface [32], which can hinder the attack. (c) The difficulty for oxygen diffusion is different in mortar than in solution and it often limits the corrosion rate [33]. The oxygen concentration at the reinforcement surface is a key factor that usually restricts or inhibits the attack in immersed structures.…”

Section: Introductionmentioning

confidence: 99%

Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

Bautista

Paredes

Velasco

et al. 2015

Construction and Building Materials

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Institutional RepositoryThis is a postprint version of the following published document:A. Bautista (et al.). HI GHLIGHTS• 5 corrugated stainless steel grades are studied in chloride contaminated mortars.• Ecorr and E IS are used for monitoring, and polarizations tests are also carried out • Spo ntaneous corrosion only appears in low Ni austenitic 520430 at partial immersion.• 532205 duplex does not show any sign of corrosion even at anodic high polarizations. ABSTRA C T Keywords: Stainless steel Steel reinforced mortar EISMortar sampl es reinforced with 5 different corrugated stainless steels were tested for 9 years in 2 differ ent conditions: partial immersion (P I) in 3. 5% NaC l, and chloride addition to the mortar and exposure to high relative humidity (H R H) . The monitoring during the exposures was carried out with corrosi on potential (Ecorr) and electrochemical impedance spectroscopy (E IS) measurements. A year before finishing (after 8 years of exposure), the reinforced mortar samples were anodically polarised to obtain more infor mation about the pitting resistance of the passi ve layers formed under the different conditions. The last year of exposure was established to study the pr ogress or repassivation of the pits. The P I is the most aggressive testing condition and it causes low intensity corrosion in 520430 austenitic stainless steel after 7 years of exposure. The 532205 duplex stainless steel shows very good corrosion behaviour.

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Steel corrosion in concrete: Determinist modeling of cathodic reaction as a function of water saturation degree

Cited by 75 publications

References 21 publications

Effect of pH on Hydrogen Absorption into Steel in Neutral and Alkaline Solutions

Effect of pH on Hydrogen Absorption into Steel in Neutral and Alkaline Solutions

Characterization of long‐term corrosion of rebars embedded in concretes sampled on French historical buildings aged from 50 to 80 years

Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

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