Preliminary Corrosion Testing of Steel Rebar Samples in 3.5% NaCl Solution with and without a Green Inhibitor

Abdulsada, Shaymaa Abbas; Törók, Tamás I.; Fazakas, Éva

doi:10.14382/epitoanyag-jsbcm.2018.10

Cited by 6 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To melt snow or stop it from building up on roads and bridges, several countries, including the United States, Canada, and Europe, use salt. Although this technology has advantages, it has a detrimental impact on steel structures because chloride ions attack steel and gradually remove the passive protective layer of steel, which causes local corrosion [12][13][14][15][16][17][18][19]. According to figure 1, an electrochemical mechanism accounts for how well steel reinforcement resists corrosion.…”

Section: Introductionmentioning

confidence: 99%

Analysis of corrosion rate, inhibition efficiency, and economic cost of XD3 reinforced concrete related to inhibitor and plasticiser types

Abdulsada

Al-Mosawi

2023

Eng. Res. Express

Self Cite

View full text Add to dashboard Cite

The main problem in the rebar case is corrosion, which is caused by the penetration and diffusion of chloride ions into reinforced concrete structures; therefore, it is essential to give the most attention to preventing or limiting the impact of this condition. So, in order to find a practical solution to the problem of corrosion of rebar, the current article focuses on demonstrating the beneficial effects of green and calcium nitrate inhibitors on chloride-induced corrosion. Thus, this paper presented an analytical procedure based on corrosion rates and the economic cost to evaluate the efficacy of such an inhibitor. Ten samples with various concrete mixtures were divided into two groups according to the type of plasticizer and inhibitor have been immersed in an aqueous solution of 3.5 wt. % sodium chloride at room temperature for 18 months. The optimal results in which the corrosion rate was significantly reduced were for the two groups of concrete mixtures, first group was (C2) which contains 3 wt.% orange peels extract inhibitor mixed with 2.4wt.% Oxydtron as water-resisting admixture, and second group was (E2) included 3 wt.% calcium nitrate inhibitor with 2.4wt.% Oxydtron as water-resisting admixture. These two groups samples have been showed more excellent corrosion resistance against the saline solution after the completed immersion period. The inhibition efficiency analysis showed that there is a direct relationship between the inhibitor concentration and the efficiency of corrosion inhibition. However, the inhibition efficiency in case of samples containing calcium nitrate inhibitor was higher than their counterparts containing green inhibitor extract. Finally, the economic cost analysis showed that, the cost of the green inhibitor extract-containing samples was lower than that of the calcium nitrate inhibitor-containing samples.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of corrosion rate, inhibition efficiency, and economic cost of XD3 reinforced concrete related to inhibitor and plasticiser types

Abdulsada

Al-Mosawi

2023

Eng. Res. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…The corrosion process transforms steel into rust, leading to (a) area reduction of the reinforcement bars and (b) volume expansion that generates splitting stresses in the concrete, which may crack and spall the concrete cover and affect the bond-slip between reinforcement and concrete. [1][2][3][4][5][6][7][8][9] The phenomenon of corrosion in steel reinforcement is an electrochemical process consisting of two half-cell reactions as shown also in Figure 1, which represent the anodic oxidation of iron and the cathodic reduction of oxygen. Both of these reactions happen simultaneously and are necessary for the continuation of the corrosion process.…”

Section: Introductionmentioning

confidence: 99%

“…And, when the concrete structures becomes and has been exposed to such chemically aggressive agents such as chloride ions, originating either from deicing salts or marine environment or chloride contaminated aggregates, the diffusion of chloride ions through the porosities and cracks of concrete, the protective passive stratum of steel will be locally destroyed and so the unprotected steel areas can and will start dissolve. The corrosion process transforms steel into rust, leading to (a) area reduction of the reinforcement bars and (b) volume expansion that generates splitting stresses in the concrete, which may crack and spall the concrete cover and affect the bond‐slip between reinforcement and concrete 1–9 . The phenomenon of corrosion in steel reinforcement is an electrochemical process consisting of two half‐cell reactions as shown also in Figure 1, which represent the anodic oxidation of iron and the cathodic reduction of oxygen.…”

Section: Introductionmentioning

confidence: 99%

Studying chloride ions and corrosion properties of reinforced concrete with a green inhibitor and plasticizers

Abdulsada

Törók

2020

Structural Concrete

Self Cite

View full text Add to dashboard Cite

The breakthrough and diffusion of chloride ions into reinforced concrete structures is the major contributing factor for inducing corrosion of the steel reinforcement. This work presents a study of the total chloride contents in concrete and the corrosion process by testing electrical resistivity and half-cell potential of concrete samples. The novelty of this work in the use of a green inhibitor-orange peel extract. The analysis was based on an experimental investigation of the samples with time of immersion in 3.5 wt% NaCl aqueous solutions at room temperature according to European Standards. For this study, different mixtures of concrete were prepared by adding two types of superplastisizers and green inhibitors in different concentrations. The results of the Cl − ions test showed that all the samples (except sample C2) after an immersion testing period of 6 months contained Cl − ions in high concentrations, indicating a greater risk of corrosion. Sample C2 (with green inhibitor and Oxydtron superplasticizer) showed the highest resistance against the chloride ion ingress measured by following the Cl − concentration changes up to the end of the 6 months testing period. This samples' good resistance to corrosion in the tested environment was also proved by the results of several sets of measurements of the electrical resistivity and half-cell potentials carried on the concrete test samples.

show abstract

“…As such, the main damage caused by corrosion of reinforcement in concrete is not the loss of steel cross-section, but cracking of the concrete cover due to expansive stresses exerted by the continued deposition of corrosion products near the steel-concrete interface. This leads to progressive deterioration and even spalling of the cover [1][2][3][4][5][6]. In general there are six phases in the concrete corrosion process for nondestructive monitoring of the service life of a concrete structure, as depicted in Fig.1 [7].…”

Section: Introductionmentioning

confidence: 99%

Measurements and studying corrosion potential of reinforced concrete samples prepared with and without a green inhibitor and immersed in 3.5%NaCl solution

Abdulsada¹,

Törók²

2018

The Publications of the MultiScience - XXXII. MicroCAD International Scientific Conference

Self Cite

View full text Add to dashboard Cite

In recent years the use of inhibitors in producing high performance concrete has increased significantly as a result of chloride and sulphate attacks. The effectiveness of an organic inhibitor extracted from a cheap organic waste of orange peel (so-called "green" inhibitor) was added to the fresh concrete. Two types of superplasticizers (Mapei Dynamon SR 31 and Oxydtron) were also used to reduce the water during concrete hardening. Then the concrete samples were immersed partially in 3.5%NaCl aqueous solutions for six months and every two weeks the corrosion potentials of the samples were regularly measured against a saturated calomel electrode. Results showed that the samples with Oxydtron had better ability to resist corrosion than the samples prepared with Mapei Dynamon SR 31, and samples with green inhibitor had less negative corrosion potentials (and even less with increasing concentration of inhibitor) than that of the reference sample (0% inhibitor).

show abstract

Preliminary Corrosion Testing of Steel Rebar Samples in 3.5% NaCl Solution with and without a Green Inhibitor

Cited by 6 publications

References 11 publications

Analysis of corrosion rate, inhibition efficiency, and economic cost of XD3 reinforced concrete related to inhibitor and plasticiser types

Analysis of corrosion rate, inhibition efficiency, and economic cost of XD3 reinforced concrete related to inhibitor and plasticiser types

Studying chloride ions and corrosion properties of reinforced concrete with a green inhibitor and plasticizers

Measurements and studying corrosion potential of reinforced concrete samples prepared with and without a green inhibitor and immersed in 3.5%NaCl solution

Contact Info

Product

Resources

About