Effects of corrosion inhibitor and functional components on the electrochemical and mechanical properties of concrete subject to chloride environment

Pan, Chonggen; Chen, Na; He, Jingzi; Liu, Shuhua; Chen, Keyu; Wang, Penggang; Xu, Peizhen

doi:10.1016/j.conbuildmat.2020.119724

Cited by 34 publications

(7 citation statements)

References 49 publications

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“…In addition, the influence of the addition of the anticorrosion material on mechanical properties is important. This statement was already previously mentioned in the literature [97,98]. The addition of 5% of pAB hydrotalcite in mortar specimens resulted in considerably improved resistance of the material to the chloride diffusion, accompanied with small decrease of compressive and flexural strength in units of MPa.…”

Section: Hydrotalcites In Reinforced Concrete As Corrosion Inhibitive Additionsupporting

confidence: 74%

Hydrotalcites in Construction Materials

et al. 2020

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Hydrotalcites are layered double hydroxides displaying a variety of stoichiometry caused by the different arrangement of the stacking of the layers, ordering of the metal cations, as well as the arrangement of anions and water molecules, in the interlayer galleries. The compounds of the hydrotalcite group show a wide range of the possible applications due to their specific properties, such as their large surface area, ion exchange ability, the insolubility in water and most of the organic sorbents, and others. Affordability, wide possibilities of manufacturing, and presence of sufficient natural deposits make hydrotalcites potentially very useful for the construction industry, as either a building material itself or an additive in mortars, concrete or in polymers composites used in constructions. Similar possible application of such material is in leakage control in a radioactive waste repository. The effect of use of these materials for ion exchange, anti-corrosion protection, radioactive ions containment, and similar purposes in building materials is examined in this review.

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Section: Hydrotalcites In Reinforced Concrete As Corrosion Inhibitive Additionsupporting

confidence: 74%

Hydrotalcites in Construction Materials

et al. 2020

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“…Searching for a safe and environmentally friendly corrosion inhibitor is necessary for corrosion inhibition [10]. Organic inhibitors, such as amino-based and imidazoline substance inhibitors, are utilized to mitigate steel bar corrosion in simulated concrete pore solutions [14], based on their great adsorption abilities. In the case of amines, such as TEA and TIPA, adsorption occurs in the form of covalent bonds.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies on Steel Corrosion Resistance of Different Inhibitors in Chloride Environment: The Effects of Multi-Functional Protective Film

et al. 2023

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A corrosion inhibitor was widely used to improve corrosion resistance of steel bar in reinforcement concrete structure. A kind of multi-component corrosion inhibitor, which is composed of organic and inorganic substances, was developed in this research. This corrosion inhibitor was comparatively studied with various other inhibitors by using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) methods. The results show that the OCP values and charge transfer resistance (calculated by EIS curves) of the multi-component corrosion inhibitor remain, respectively, as high as −0.45 V and 932.19 kΩ·cm−2 after 60 days immersion, which are significantly better than other groups. Wide passivation interval and various peaks in cyclic voltammograms (CV) were applied to analyze the mechanism of adsorption (organic substance) and oxidation–reduction reactions (inorganic substance). The functional groups -OH in triethanolamine (TEA) and tri-isopropanolamine (TIPA) bond to the steel bar surface quickly, behaving as an adsorbent of organic substance in early age. An additional protective precipitate related to the reactions of Fe3+ was formed by inorganic substances (Fe2(MoO4)3 and FePO4), which is consistent with the EIS results and equivalent electrochemical circuits. As an eco-friendly substitute, multi-component corrosion inhibitors possess similar or even better protecting effects on steel bars in comparison to calcium nitrite. In addition, the concept of a “multi-functional protective film” was proposed, providing a new insight to achieve modified anti-corrosion capacity of inhibitors.

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“…The volume after corrosion becomes 3-4 times of the original, which leads to the cracking of concrete and further exacerbates corrosion. [2] The steel bars were exposed to atmospheric environment and further corroded, which eventually leads to the failure of reinforced concrete. [3] A variety of methods have been proposed to prevent corrosion of reinforced concrete, for example, using high performance concrete, coating concrete surface and surface modification of steel bars, cathodic protection of concrete and addition of a certain amount of corrosion inhibitor.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies on the Inhibition Properties of an Imidazoline Derivative on Q235 Corrosion in a Simulated Concrete Pore Solution

et al. 2022

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A novel imidazoline derivative has been synthesized and its molecular structure has been confirmed by IR, Raman, elemental analysis and NMR, the molecular structure of the inhibitor is similar to that of the previous research. In this paper, the inhibition performance and inhibition mechanism of the three inhibitors (SMID, SMIS and SMIF) in concrete simulation solution are analyzed and compared. The corrosion inhibition efficiency of SMIF (96.02 %) > SMIS (93.62 %)>SMID(93.01 %) in weight loss experiment, the SMIS of electrochemistry of Nyquist and potentiodynamic polarization were 89.72 % and 92.03 % respectively, which indicated that SMIS had good corrosion inhibition effect. Electrochemical experiments show that the SMIS belongs to anodic type, and the mechanism of SMIS can form a protective film on the surface Q235 and inhibit the charge transfer. The results of FTIR, EDS and XPS show that SMIS can be adsorbed on the surface of Q235, which is also confirmed by density functional theory (DFT) and molecular dynamics simulation (MD).

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Effects of corrosion inhibitor and functional components on the electrochemical and mechanical properties of concrete subject to chloride environment

Cited by 34 publications

References 49 publications

Hydrotalcites in Construction Materials

Hydrotalcites in Construction Materials

Comparative Studies on Steel Corrosion Resistance of Different Inhibitors in Chloride Environment: The Effects of Multi-Functional Protective Film

Experimental and Theoretical Studies on the Inhibition Properties of an Imidazoline Derivative on Q235 Corrosion in a Simulated Concrete Pore Solution

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