Corrosion rate monitoring in the laboratory and on-site

Andrade, Carmen; Alonso, C.

doi:10.1016/0950-0618(95)00044-5

Cited by 426 publications

(250 citation statements)

References 16 publications

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“…However, after 150 days of immersion, E corr was ennobled up to -0.386 V vs. Ag/AgCl and the i corr value was around 0.3 lA cm -2 , closer to the values that would be expected for steel in a passive state [52]. This behavior could be associated with the consumption of sulfide by formation of an AF m type phase (e.g., C 3 AÁ2CaSÁ10H 2 O) [30,54,55], as the activation reaction continued taking place with the time; these phases can show an intense green color.…”

Section: Polarization Curvesmentioning

confidence: 85%

“…13. The criteria used to analyze these results are conventionally based on the state of corrosion of steel in Portland cement-based concretes reported in [52], where an i corr of \ 0.1 lA cm -2 corresponds to passivity, 0.1 lA cm -2 \ i corr \ 0.5 lA cm -2 corresponds to low corrosion, 0.5 lA cm -2 \ i corr \ 1.0 lA cm -2 to high corrosion, and i corr [ 1.0 lA cm -2 to very high corrosion.…”

Section: Polarization Curvesmentioning

confidence: 99%

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Influence of slag composition on the stability of steel in alkali-activated cementitious materials

et al. 2017

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Among the minor elements found in metallurgical slags, sulfur and manganese can potentially influence the corrosion process of steel embedded in alkali-activated slag cements, as both are redox-sensitive. Particularly, it is possible that these could significantly influence the corrosion process of the steel. Two types of alkali-activated slag mortars were prepared in this study: 100% blast furnace slag and a modified slag blend (90% blast furnace slag ? 10% silicomanganese slag), both activated with sodium silicate. These mortars were designed with the aim of determining the influence of varying the redox potential on the stability of steel passivation under exposure to alkaline and alkaline chloride-rich solutions. Both types of mortars presented highly negative corrosion potentials and high current density values in the presence of chloride. The steel bars extracted from mortar samples after exposure do not show evident pits or corrosion product layers, indicating that the presence of sulfides reduces the redox potential of the pore solution of slag mortars, but enables the steel to remain in an apparently passive state. The presence of a high amount of MnO in the slag does not significantly affect the corrosion process of steel under the conditions tested. Mass transport through the mortar to the metal is impeded with increasing exposure time; this is associated with refinement of the pore network as the slag continued to react while the samples were immersed.

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Section: Polarization Curvesmentioning

confidence: 85%

Section: Polarization Curvesmentioning

confidence: 99%

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

et al. 2017

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“…The r of SCM-free systems (NA 100% PC and RCA 100% PC) do not exceed the 10 kW-cm threshold (Andrade and Alonso, 1996). Regarding SCM systems, they have a significant and positive effect on the r of concrete; the r of system RCA 30% FA doubles the value of SCM systems; while r of RCA 10% SF system is four times higher.…”

Section: Doi: 104067/so718-50732013000100002mentioning

confidence: 82%

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

et al. 2013

Rev. ing. constr.

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“…Afterwards, the CR starts to decrease monotonically reaching, at the end of the test, a CR value close to those obtained in matrixes with no-additions, or with the additions of sulphate ions. In all cases, after 900 days, the steel plates behave as if they were passivated (no matter the additions of aggressive species) with a low or negligible CR [11]. After the tests, the plates were observed under the SEM.…”

Section: Resultsmentioning

confidence: 99%

Corrosion susceptibility of steel drums to be used as containers for intermediate level nuclear waste

Farina

Rodríguez

Duffó

2013

EPJ Web of Conferences

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Abstract. The present work is a study of the corrosion susceptibility of steel drums in contact with cemented ion-exchange resins contaminated with different types and concentrations of aggressive species. A special type of specimen was manufactured to simulate the cemented ion-exchange resins in the drum. The evolution of the corrosion potential and the corrosion rate of the steel, as well as the electrical resistivity of the matrix were monitored over a time period of 900 days. The aggressive species studied were chloride ions (the main ionic species of concern) and sulphate ions (produced during radiolysis of the cationic exchange-resins after cementation). The work was complemented with an analysis of the corrosion products formed on the steel in each condition, as well as the morphology of the corrosion products. When applying the results obtained in the present work to estimate the corrosion depth of the steel drums containing the cemented radioactive waste after a period of 300 years (foreseen durability of the Intermediate Level Radioactive Waste facility in Argentina) , it is found that in the most unfavourable case (high chloride contamination), the corrosion penetration will be considerably lower than the thickness of the wall of the steel drums.

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Corrosion rate monitoring in the laboratory and on-site

Cited by 426 publications

References 16 publications

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

Corrosion susceptibility of steel drums to be used as containers for intermediate level nuclear waste

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