Corrosion Behavior of Pre-Rusted Rebars in Cement Mortar Exposed to Harsh Environments

Burtuujin, Gankhuyag; Son, Dasom; Jang, Indong; Yi, Chongku; Lee, Hyerin

doi:10.3390/app10238705

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…The corrosion of reinforcing steel is an electrochemical process, and according to the literature, it is mainly due to the interaction of concrete structures with the environment where they were built, which may contain aggressive agents that may be present in the atmosphere. such as CO 2 or aggressive ions (Sulphates and Chlorides), but there is also the possibility that the concrete mixture contains these agents since its preparation or manufacturing [6]- [9]. The elements of reinforced concrete structures that are most susceptible to interacting with sulfates are the foundations, such as foundation slabs, continuous or isolated footings, bridge piers, etc.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Potential of Half-Cell AISI 1018 and GS in Concrete Buried in Sand in the Presence of MgSO4

Baltazar-García,

Baltazar-Zamora,

Santiago-Hurtado

et al. 2024

EJENG

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This project, in the area of reinforced concrete corrosion, evaluated the potential of half-cell AISI 1018 CS (Carbon Steel) and GS Steel (Steel with galvanized coating); 15 cm long bars were used as reinforcement in specimens of concrete buried in a Type SP Sand (contaminated with 0% and 3% MgSO4). The experimental arrangement of this research represents the case of the elements of the foundations of concrete structures that are planted near marine areas where this type of soil exists with the presence of high contents of depassivating ions such as sulfates. The study specimens were made with two concrete mixtures with a water/cement ratio 0.45 but with different types of cement (Portland Cement and Sulfate Resistant Cement). For monitoring the half-cell potential according to ASTM C 876-15, the specimens were buried in the clean SP soil and in the same soil but contaminated with MgSO4. After more than 270 days of exposure to uncontaminated SP sand contaminated with MgSO4, the behavior of the half-cell potentials or corrosion potentials show that the specimen made with the sulfate-resistant cement and reinforced with GS Steel (Steel with galvanized coating) presents the highest resistance to corrosion by MgSO4 at a concentration of 3%.

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Section: Introductionmentioning

confidence: 99%

Behavior of Potential of Half-Cell AISI 1018 and GS in Concrete Buried in Sand in the Presence of MgSO4

Baltazar-García,

Baltazar-Zamora,

Santiago-Hurtado

et al. 2024

EJENG

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“…In the field of oil and gas exploitation and transportation, the phenomenon of corrosion and perforation will occur and cause pipeline rupture when the underground oil and gas transport pipeline is put into operation for one to two years, which will lead to leakage of oil and gas, environmental pollution, and even cause fire, explosion and other accidents, threatening personal safety and causing significant asset losses [3][4][5][6]. Because of the organic solvent of this material system, such as toluene, xylene, etc., it will cause relatively serious pollution to the environment in the construction or applied process, and impose a serious impact on the local ecological environment [7][8][9]. Therefore, it is of great significance to develop a material system with excellent corrosion resistance, and economic and environmental protection for the sustainable development of society and environment [10].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of Interface Properties between Water-Based Inorganic Zinc Silicate Coating Modified by Organosilicone and Iron Substrate

Gao¹,

Xiong²,

Zhang³

et al. 2023

Journal of Renewable Materials

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The interface properties of Fe(101)/zinc silicate modified by organo-siloxane (KH-570) was studied by using the method of molecular dynamics simulation. By calculating the temperature and energy fluctuation of equilibrium state, equilibrium concentration distribution, MSD of layer and different groups, and interaction energy of two interface models, the influencing mechanism on the interface properties of adding organosiloxane into coating system was studied at the atomic scale. It shows that the temperature and energy of interface oscillated in a small range and it was exited in a state of dynamic equilibrium within the initial simulation stage (t < 20 ps). It can be seen from the multiple peak states of concentration distribution that the iron substrate, organo-siloxane and zinc silicate are distributed in the form of a concentration gradient in the real environment. The rapid diffusion of free zinc powder in zinc silicate coating was the essential reason that affected the comprehensive properties of coating. The interface thickness decreased from 7.45 to 6.82 Å, the MSD of free zinc powder was effectively reduced, and the interfacial energy was increased from 104.667 to 347.158 kcal/mol after being modified by organo-siloxane.

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“…For example, the volumes of Fe 3 O 4 , Fe(OH) 2 , Fe(OH) 3 and Fe(OH) 3 •3H 2 O [32] are, respectively, two, three, four and six times higher than that of iron. In general, the volume of corrosion products, a mixture of these oxides, hydroxides and oxyhydroxides, can be considered 3-4 times greater than that of iron [33].…”

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confidence: 99%

The Useful Life of Reinforced Concrete Structures with Reinforcement Corrosion Due to Carbonation in Non-Aggressive and Normal Exposures in the Spanish Mediterranean

2022

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Some reinforced concrete structures must be repaired at an early stage in their life due to the oxidation processes suffered by their reinforcements; such processes involve serious pathologies that affect the stability and safety of buildings. Spanish legislation distinguishes several classes of environments, with non-aggressive and normal exposure providing a longer useful life of the structure. The present study shows that some structural elements in reinforced concrete, mainly the pillars in the area of contact with the ground, are exposed to significant corrosion by carbonation. This position of the structural elements dramatically and abruptly shortens the useful life of the models provided for the current regulations. A total of 17 pillars in 10 buildings of different ages and locations in the Spanish Mediterranean area, not subject to the presence of chlorides, have been analyzed. These buildings are situated in environments considered by the standard as normal and non-aggressive. The actual carbonation that these elements present have been compared with that which can be derived from the model established by Spanish regulations. Of these pillars, 14 present a carbonation higher than that derived from the model, and the last three pillars largely conform to the figures of the model. This significant deviation shows the need for a revision of the Spanish EHE 08 regulation, which should include aspects such as the action of dampness by capillarity and the differences in electrochemical potential between the different materials.

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Corrosion Behavior of Pre-Rusted Rebars in Cement Mortar Exposed to Harsh Environments

Cited by 8 publications

References 26 publications

Behavior of Potential of Half-Cell AISI 1018 and GS in Concrete Buried in Sand in the Presence of MgSO4

Behavior of Potential of Half-Cell AISI 1018 and GS in Concrete Buried in Sand in the Presence of MgSO4

Molecular Dynamics Simulation of Interface Properties between Water-Based Inorganic Zinc Silicate Coating Modified by Organosilicone and Iron Substrate

The Useful Life of Reinforced Concrete Structures with Reinforcement Corrosion Due to Carbonation in Non-Aggressive and Normal Exposures in the Spanish Mediterranean

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