Influence of pre-rusting on steel corrosion in concrete

Novák, Pavel; Mala, R.; Joska, Luděk

doi:10.1016/s0008-8846(01)00459-8

Cited by 40 publications

(19 citation statements)

References 5 publications

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“…This corrosion rate in this inactive state is estimated to be 0.04 mils/year (1µm/year). [7] This corrosion rate corresponds to a passive current density (I corr ) of 0.09 µΑ/cm 2 , which is just below the typical threshold used for the passive state, i.e. I corr < 0.1 µA/cm 2 .…”

Section: Corrosion Mechanisms In Concrete/groutmentioning

confidence: 93%

Life Estimation of High Level Waste Tank Steel for F-Tank Farm Closure Performance Assessment

Subramanian¹,

Wiersma²,

Harris³

2007

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High level radioactive waste (HLW) is stored in underground carbon steel storage tanks at the Savannah River Site. The underground tanks will be closed by removing the bulk of the waste, chemical cleaning, heel removal, stabilizing remaining residuals with tailored grout formulations, and severing/sealing external penetrations. The life of the carbon steel materials of construction in support of the performance assessment has been completed. The estimation considered general and localized corrosion mechanisms of the tank steel exposed to grouted conditions. A stochastic approach was followed to estimate the distributions of failures based upon mechanisms of corrosion accounting for variances in each of the independent variables. The methodology and results used for one-type of tank is presented.

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Section: Corrosion Mechanisms In Concrete/groutmentioning

confidence: 93%

Life Estimation of High Level Waste Tank Steel for F-Tank Farm Closure Performance Assessment

Subramanian¹,

Wiersma²,

Harris³

2007

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“…Mendoza et al (1994) also found a very high corrosion rate for the rusted steel bars. On the other hand, AlTayyib et al (1990) reported that the initial rusting does not have an adverse effect on the corrosion resistance of rebar embedded in concrete, which contradicts with the results obtained by Mendoza et al (1994) Novak et al (2001) and Li and Sagues (2001). Also, based on the accelerated laboratory investigations and long-term exposure tests in the marine environment, it was found that micro-structure of steel-concrete interface (physical adhesion, voids, etc.…”

Section: Introductionmentioning

confidence: 93%

“…Based on a study on different surface conditions of steel bars by Li and Sagues (2001), it was concluded that removal of mill scale or rust from the steel surface by sandblasting is beneficial in elevating the chloride corrosion threshold in alkaline solution, although the corrosion rate of sandblasted steel after pitting initiation is higher than those of the mill-scaled and pre-rusted steel bars. Novak et al (2001) reported that pre-rusted steel bars in concrete, even without any chloride content, shows technically unacceptable average corrosion rate. Mendoza et al (1994) also found a very high corrosion rate for the rusted steel bars.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of Steel Bars in Concrete with the Variation of Microstructure of Steel-Concrete Interface

Mohammed

Hamada

Hasnat

et al. 2015

ACT

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An experimental investigation was carried out on chloride induced corrosion of steel bars in concrete under marine environment with the variation of micro-structure of steel-concrete interface. To create the variation of micro-structure of steel-concrete interface, steel bars coated with cement paste of different W/Cs and cement types were used. For investigation, cylindrical concrete specimens were made with steel bars (with and without cement paste coating). W/C ratios of cement paste coat were 0.3, 0.5, 0.7 and 1.0. The specimens were exposed to an accelerated seawater exposure controlled with automatic wetting and drying. The specimens were tested till 45 cycles in the exposure. Test items include compressive strength of concrete, chloride ingress into concrete, electrochemical evaluation of corrosion, microscopic investigations of steel-concrete interface by optical microscope, scanning electron microscope (SEM), and linear traverse. It is revealed that the initiation of corrosion is significantly influenced by the nature of micro-structure of the steelconcrete interface, such as size of voids at the steel-concrete interface.

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“…Influencia de la temperatura de auto revenido de barras tratadas, sobre el grado de corrosión a 48 horas [13].…”

Section: Corrosiónunclassified

Barras De Refuerzo De Hormigón: Mecanismos De Endurecimiento Y Performance en Uso

Madias¹,

Wright²,

Wolkowicz³

2017

Anais Do Seminário De Laminação E Conformação

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ResumoSe analizan las distintas alternativas para la producción de barras de refuerzo de hormigón: endurecimiento por solución sólida ("dureza natural"); endurecimiento por temple y autorevenido en línea (Tempcore, Thermex, etc.) y endurecimiento por precipitación (microaleación con niobio, vanadio o titanio) y su influencia sobre la performance de las barras, en lo que hace a la resistencia a la corrosión, al fuego y a los sismos.. Palavras-chave: Vergalhão; Tempcore; Aço microligado; Seismo. REINFORCING STEEL BAR: HARDENING MECHANISMS AND PERFORMANCE IN APPLICATION AbstractThe alternatives for the production of concrete reinforcing bars are analyzed: solid solution hardening ("natural hardness"); quench hardening and self-tempering (Tempcore, Thermex, etc.) and grain refining / precipitation hardening (microalloying with niobium, vanadium, or titanium) and their influence on the performance of the rebar, regarding corrosion resistance, fire and earthquakes.

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Influence of pre-rusting on steel corrosion in concrete

Cited by 40 publications

References 5 publications

Life Estimation of High Level Waste Tank Steel for F-Tank Farm Closure Performance Assessment

Life Estimation of High Level Waste Tank Steel for F-Tank Farm Closure Performance Assessment

Corrosion of Steel Bars in Concrete with the Variation of Microstructure of Steel-Concrete Interface

Barras De Refuerzo De Hormigón: Mecanismos De Endurecimiento Y Performance en Uso

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