Inhibitor evaluation in different simulated concrete pore solution for the protection of steel rebars

Verbruggen, Hilke; Terryn, Herman; Graeve, Iris De

doi:10.1016/j.conbuildmat.2016.07.115

Cited by 71 publications

(23 citation statements)

References 20 publications

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“…It is important to note that this experimental arrangement is very little used in the study of corrosion of reinforcing steel in reinforced concrete structures, so the proposal in the present investigation is of great importance and innovation, since it simulates the situation of displacing the foundations of all types of civil Infrastructure, in soils where significant concentrations of aggressive agents such as chlorides and sulfates may be found, as commented in the introduction, there are few concrete corrosion studies carried out, considering to the soils as aggressive contact media for the elements such as footings, piles, foundation slabs, which are the elements that support buildings, bridges, highways and industrial plants however, there are a large number of corrosion studies of reinforcing steel considering aggressive media such as seawater (Chaleea et al, 2009;Uthaman et al, 2017), solutions simulating marine or sulphated environments (Duarte et al, 2014;Santiago et al, 2016b), studies carried out in situ, with exposure to the atmosphere (De Vera et al, 2017;Kwon et al, 2017), investigations with alkaline solutions simulating the pore solution in the concrete (Williamsona and Burkan, 2016;Verbruggen et al, 2017) etc. ; for all the above, it is the relevance of the results obtained, analyzed and discussed in this research.…”

Section: Exposure Of Specimens To Soil Contaminated Mh Typementioning

confidence: 99%

Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides

et al. 2019

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Polarization Resistance. LPR (ASTM-G59). The specimens were buried in a soil type MH contaminated with 0, 1, 2, and 3 wt.% NaCl as aggressive agent by weight of soil, the exposure time was 260 days where, the results show that when the presence of NaCl in the soil was increased to 2 and 3% the levels of corrosion are from high to very high in all concretes, presenting a little better performance the concretes reinforced with galvanized steel and a small benefit could be identified or related to the properties of a denser and less impermeable matrix that presented the concrete mix made with cement CPC 30R RS.

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Section: Exposure Of Specimens To Soil Contaminated Mh Typementioning

confidence: 99%

Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides

et al. 2019

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“…Inorganic inhibitors can form an oxide film on the surface of steel, passivating the film completely from the surface to protect the reinforcement. However, a disadvantage of this kind of inhibitor is that it can only provide protection for steel when the concentration on the surface of steel is very high, but for lower concentration there is a high risk of corrosion (Montemor et al 2003;Bolzoni et al 2006;Holloway et al 2004;Verbruggen et al 2016). Organic inhibitors have protective effects on reinforcement by adsorbing on the surface of steel to form a protective film.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness Protection Performance of an Internal Blending Organic Corrosion Inhibitor for Carbon Steel in Chloride Contaminated Simulated Concrete Pore Solution

Wang

Zhao

et al. 2020

ACT

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Application of corrosion inhibitors is considered as one of the most economical and effective solutions for the protection of reinforced concrete structures under severe environment. The aim of this paper is to investigate the protection performance and mechanism of an internal blending organic inhibitor for carbon steel in chloride contaminated simulated concrete pore solution. The influences of concentration of inhibitor, chloride content and pH value of the solutions on the protection efficiency were investigated. Both weight loss and electrochemical were used to evaluate the protection efficiency of the inhibitor. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) analyses were performed to reveal the mechanism of corrosion resistance of the inhibitor. Results indicated that the corrosion of carbon steel in chloride contaminated simulated concrete pore solution was highly resisted in presence of inhibitor, the inhibition efficiency of 3.5% NaCl saturated Ca(OH) 2 solution with 4% inhibitor reached 89%. With lower pH value, corrosion of steel will happen easier even with addition of inhibitor. However, inhibitor will still have effective even to protect carbon steel in fully carbonated concrete. The organic film with characteristics of aromatic groups can be detected on the carbon steel surface in presence of inhibitor, confirming the protection effects for steel.

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“…When Cl -and NO 2 -exist in the cement paste, Cl -will react with AFm to form Friedel's salt, and NO 2 -will react with AFm to form NO 2 -AFm. Another bound form is when the ions are physically adsorbed into the surface of a hydration product, such as calcium silicate hydrate gel C-S-H [20][21][22][23]. Figure 1 is a contrast graph: It shows the free-form NO 2 -concentration of cement paste specimens with 0.5%, 1.0%, 1.5%, and 2.0% NO 2,…”

Section: Effect Of Erosion CLmentioning

confidence: 99%

Effect of Chloride Ion on Free Nitrite Ion in Cement

Xing

Liu

Dai

et al. 2018

International Journal of Corrosion

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This was an experiment in which chloride was externally permeated into cement paste. The influence of Cl -on the content and distribution of free-form NO 2 -in the cement paste was researched using the chemical quantitative analysis method. The action mechanism was investigated by the micro-means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the physical competitive adsorption of Cl -with NO 2 -on C-S-H and the chemical substitution of Cl -to NO 2 -AFm caused more free-form NO 2 -in the cement paste. In the cement paste with chloride salt erosion, the NO 2 -concentration in the erosion surface was the lowest, and the NO 2 -concentration reached the highest value at 10mm from the erosion surface. The concentration decreased gradually with the depth from the erosion surface.

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Inhibitor evaluation in different simulated concrete pore solution for the protection of steel rebars

Cited by 71 publications

References 20 publications

Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides

Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides

Effectiveness Protection Performance of an Internal Blending Organic Corrosion Inhibitor for Carbon Steel in Chloride Contaminated Simulated Concrete Pore Solution

Effect of Chloride Ion on Free Nitrite Ion in Cement

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