Influence of chloride corrosion on tension capacity of rebars

Ghanooni-Bagha, Mohammad

doi:10.1007/s11771-021-4834-3

Cited by 9 publications

(1 citation statement)

References 28 publications

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“…It is well known that Cl − ions constitute the primary environmental factor influencing the corrosion resistance of steel [8][9][10]. Penetration by Cl − ions can loosen and induce porosity in the corrosion product film, which promotes contact between the electrolyte solution and steel matrix and further accelerates the corrosion of the steel matrix [11][12][13]. It has been suggested that Cl − ions play a significant role only in the initial stage of corrosion, in which the Cl − concentration is low.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Corrosive Influence of Chloride Ions on Slag Recovery Machine Inner Guide Wheel in Power Plants

Hu,

Ma,

Bai

et al. 2024

Materials

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An important method that coal-fired power plants use to realise low-cost zero discharge of desulfurisation wastewater (FGD wastewater) is to utilise wet slag removal systems. However, the high Cl− content of FGD wastewater in wet slag removal systems causes environmental damage. In this study, the corrosion behaviour of the inner guide wheel material, 20CrMnTi, was studied using dynamic weight loss and electrochemical methods. X-ray diffraction, scanning electron microscopy, and energy spectroscopy were used to analyse the organisational and phase changes on the surfaces and cross sections of the samples at different Cl− concentrations. The corrosion rate increased with the Cl− concentration up to 20 g/L, but it decreased slightly when the Cl− concentration exceeded 20 g/L. In all the cases, the corrosion rate exceeded 0.8 mm/a. The corrosion product film density initially increased and then decreased as the Cl− concentration increased. The corrosion products comprised mainly α-FeOOH, γ-FeOOH, β-FeOOH, Fe3O4, and γ-Fe2O3.

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Section: Introductionmentioning

confidence: 99%

Investigating the Corrosive Influence of Chloride Ions on Slag Recovery Machine Inner Guide Wheel in Power Plants

Hu,

Ma,

Bai

et al. 2024

Materials

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Collapse assessment of high-rise reinforced concrete building under chloride induced pitting corrosion subjected to near-field and far-field ground motions

Jafary,

Zaherbin,

Ghanooni-Bagha

et al. 2023

Sādhanā

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Reinforced concrete structures are vulnerable to corrosion considering its influences on the performance of the structure during the possible earthquakes. Corrosion mostly occurs due to two main reasons: chloride and carbon dioxide penetration into the concrete that leads to the chemical reaction between them and concrete compositions. Chloride diffusion into the concrete brings about rebar pitting, while carbonation-induced corrosion causes uniform corrosion of rebars. In the present study, chloride-induced corrosion was investigated. In this regard, the Haselton 20story reinforced concrete model was chosen. At first, corrosion initiation time was determined by probabilistic Monte-Carlo Simulation methods for three water to cement ratios of 0.4, 0.45, and 0.5. Next, the effects of corrosion on the mechanical properties of the steel and the concrete were taken into account by using equations available in the literature. Seismic performance of corroded structure was evaluated by conducting Non-linear static and incremental dynamic analysis (IDA).FEMA p695 far-field and near-field ground motions were selected for dynamic analysis. The reduction of overstrength and ductility over 40 years after corrosion initiation was calculated. The results showed that ductility was more affected by corrosion rather than overstrength. The probabilities of the structure being at the four damage states of slight, moderate, extensive, and complete damage were estimated based on fragility curves obtained from IDA. It was observed that ten years after initiation of corrosion there is only a slight difference in the probability of damage states and after that considerable distinction was observed, especially in water to cement ratio of 0.5. Moreover, it was seen that exceeding selected damage states under non-pulse-like near field ground motions is more likely.

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Probabilistic study of strength and cover effects on reinforced concrete chloride corrosion

et al. 2022

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Influence of chloride corrosion on tension capacity of rebars

Cited by 9 publications

References 28 publications

Investigating the Corrosive Influence of Chloride Ions on Slag Recovery Machine Inner Guide Wheel in Power Plants

Investigating the Corrosive Influence of Chloride Ions on Slag Recovery Machine Inner Guide Wheel in Power Plants

Collapse assessment of high-rise reinforced concrete building under chloride induced pitting corrosion subjected to near-field and far-field ground motions

Probabilistic study of strength and cover effects on reinforced concrete chloride corrosion

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