ArticleMaterials and structures2024
Chloride-induced corrosion of steel in concrete-insights from bimodal neutron and X-ray microtomography combined with ex-situ microscopy.
Article in Materials and structures, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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27 citing papers in PubMed, 44 citations in OpenAlex.
- High-Sensitivity Identification of Micro-Voids at Thick Steel Shell-Concrete Interfaces Using Elastic Wave Analysis and Feature Attention Mechanisms.Sensors (Basel, Switzerland) · 2026Article
- Precipitation of corrosion products in macroscopic voids at the steel-concrete interface: observations, mechanisms and research needs.Materials and structures · 2025Article
- Speciation Controls the Kinetics of Iron Hydroxide Precipitation and Transformation at Alkaline pH.Environmental science & technology · 2024Article
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- Microscale chemical imaging to characterize and quantify corrosion processes at the metal-electrolyte interface.Npj Materials degradation · 2024Article
- Degradation of Steel Rebar Tensile Properties Affected by Longitudinal Non-Uniform Corrosion.Materials (Basel, Switzerland) · 2023Article
- Hydrothermal Synthesis of CaAl-LDH Intercalating with Eugenol and Its Corrosion Protection Performances for Reinforcing Bar.Materials (Basel, Switzerland) · 2023Article
- Speciation of iron(II/III) at the iron-cement interface: a review.Materials and structures · 2023Article
- Influence of a Nano-Hydrophobic Admixture on Concrete Durability and Steel Corrosion.Materials (Basel, Switzerland) · 2022Article
- Modelling Strategies for Reinforced Concrete Elements under Corrosion Degradation.Materials (Basel, Switzerland) · 2022Article
- Parametric Design Studies of Mass-Related Global Warming Potential and Construction Costs of FRP-Reinforced Concrete Infrastructure.Polymers · 2022Article
- Electrical Resistivity Measurements for Nondestructive Evaluation of Chloride-Induced Deterioration of Reinforced Concrete-A Review.Materials (Basel, Switzerland) · 2022Review
- The performance of three novel Gemini surfactants as inhibitors for acid steel corrosion: experimental and theoretical studies.RSC advances · 2021Article
- Electrochemical Study of Clean and Pre-Corroded Reinforcements Embedded in Mortar Samples with Variable Amounts of Chloride Ions.Materials (Basel, Switzerland) · 2021Article
- Novel Nano-Precursor Inhibiting Material for Improving Chloride Penetration Resistance of Concrete: Evaluation and Mechanism.Materials (Basel, Switzerland) · 2021Article
- Corrosion Fatigue Damages of Rebars under Loading in Time.Materials (Basel, Switzerland) · 2021Article
- Polytriphenylamine and Poly(styrene-Polymers · 2021Article
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Authors and funding
8 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The steel-concrete interface (SCI) is known to play a major role in corrosion of steel in concrete, but a fundamental understanding is still lacking. One reason is that concrete's opacity complicates the study of internal processes. Here, we report on the application of bimodal X-ray and neutron microtomography as in-situ imaging techniques to elucidate the mechanism of steel corrosion in concrete. The study demonstrates that the segmentation of the specimen components of relevance-steel, cementitious matrix, aggregates, voids, corrosion products-obtained through bimodal X-ray and neutron imaging is more reliable than that based on the results of each of the two techniques separately. Further, we suggest the combination of tomographic in-situ imaging with ex-situ SEM analysis of targeted sections, selected based on the segmented tomograms. These in-situ and ex-situ characterization techniques were applied to study localized corrosion in a very early stage under laboratory chloride-exposure conditions, using reinforced concrete cores retrieved from a concrete bridge. Several interesting observations were made. First, the acquired images revealed the formation of several corrosion sites close to each other. Second, the morphology of the corrosion pits was relatively shallow. Finally, only about half of the total 31 corrosion initiation spots were in close proximity to interfacial macroscopic air voids, and > 90% of the more than 160 interfacial macroscopic air voids were free from corrosion. The findings have implications for the mechanistic understanding of corrosion of steel in concrete and suggest that multimodal in-situ imaging is a valuable technique for further related studies. Supplementary Information: The online version contains supplementary material available at 10.1617/s11527-024-02337-7.
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