Comparison of the effect of organic and inorganic corrosion inhibitors on the rheology of self-compacting concrete

Blankson, Marva Angela; Erdem, Savaş

doi:10.1016/j.conbuildmat.2014.12.032

Cited by 29 publications

(8 citation statements)

References 12 publications

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“…The inhibition of these compounds depends on the molecular structure and the affinity and compatibility with steel [73][74][75][76]. Organic MCIs diffuse to the anodic or cathodic sites and adsorb on the steel surface through covalent bonds and polar groups [77][78][79].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Mechanism of Steel Reinforcements in Mortar Using Soluble Phosphates: A Critical Review

et al. 2021

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The corrosion inhibition mechanism of soluble phosphates on steel reinforcement embedded in mortar fabricated with ordinary Portland cement (OPC) are reviewed. This review focuses soluble phosphate compounds, sodium monofluorophosphate (Na2PO3F) (MFP), disodium hydrogen phosphate (Na2HPO4) (DHP) and trisodium phosphate (Na3PO4) (TSP), embedded in mortar. Phosphate corrosion inhibitors have been deployed in two different ways, as migrating corrosion inhibitors (MCI), or as admixed corrosion inhibitors (ACI). The chemical stability of phosphate corrosion inhibitors depends on the pH of the solution, H2PO4− ions being stable in the pH range of 3–6, the HPO42− in the pH range of 8–12, while the PO43− ions are stable above pH 12. The formation of iron phosphate compounds is a thermodynamically favored spontaneous reaction. Phosphate ions promote ferrous phosphate precipitation due to the higher solubility of ferric phosphate, thus producing a protective barrier layer that hinders corrosion. Therefore, the MFP as well as the DHP and TSP compounds are considered anodic corrosion inhibitors. Both types of application (MCI and ACI) of phosphate corrosion inhibitors found MFP to present the higher inhibition efficiency in the following order MFP > DHP > TSP.

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Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Mechanism of Steel Reinforcements in Mortar Using Soluble Phosphates: A Critical Review

et al. 2021

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“…Prevention of steel reinforcement corrosion in RC structures can be achieved either by modifying the properties of concrete cover or using corrosion resistant bars. For example, the properties of concrete can be modified by applying inhibitors [10,11], reducing water-cement ratio, adding high performance admixtures [12][13][14], and optimizing aggregate gradation. Corrosion resistant bars include non-metallic bars such as fiber reinforced polymer (FRP) bars [15,16], stainless steel bars, stainless steel or copper clad steel bars [17], and coated steel bars [18,19].…”

Section: Introductionmentioning

confidence: 99%

Impact and corrosion resistances of duplex epoxy/enamel coated plates

Tang

Bao

Chen

et al. 2016

Construction and Building Materials

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The microstructure, impact resistance, pull-off adhesion strength, and corrosion resistances of duplex epoxy/enamel coating applied on steel plates are investigated experimentally. In comparison with those of individual epoxy and enamel coatings, the duplex coating has lower adhesion strength, higher impact resistance, higher short-term and long-term corrosion resistances both in 3.5 wt.% NaCl solution and saturated Ca(OH) 2 solution with various chloride concentrations. This is because the outer epoxy fills the micro pores in the inner enamel. Impact induced damage significantly reduces the corrosion resistances of epoxy and duplex coatings but has little effect on the corrosion resistance of enamel coating.

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“…Fly ash, slag, and silica fume, as mineral admixtures, facilitate the cementation of concrete. In steady-state chloride ion test, these auxiliary cementitious materials have strong binding capacity of chloride ions [16][17][18]. In our research, the chloride diffusivity is tested by the RCM method, which has nothing to do with the binding capacity of chloride ions.…”

Section: Chloride Penetration Resistancementioning

confidence: 99%

Effects of Compound Rust Inhibitor on the Performance of Concrete with a Large Amount of Mineral Admixtures

Lu¹,

Li²,

Luo³

et al. 2020

RCMA

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The corrosion of rebars in concrete is a major cause of the falling bearing capacity of concrete structures. The durability of concrete could be effectively enhanced by adding mineral admixtures. Many studies have shown that rust inhibitors can effectively prevent rebar corrosion. Taking commonly used slag, fly ash, and silica fume as mineral admixtures, this paper explores how an alcohol-amine compound rust inhibitor affects the compressive strength, chloride penetration resistance, carbonation resistance, and rebar corrosion resistance of concrete with a large amount of mineral admixtures. The research results show that the addition of rust inhibitor hinders the early hydration of cementitious materials in concrete; the chloride diffusivity and carbonation depth of concrete were minimized, when the ratio of N,N-dimethylethanolamine (DMEA) to sodium monofluorophosphate (MFP) in the compound rust inhibitor stands at 15:1; the addition of rust inhibitor clearly suppressed the corrosion loss of the rebars in concrete, resulting in a low rebar corrosion rate. The research results provide experimental evidence for reducing rebar corrosion in reinforced concrete.

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Comparison of the effect of organic and inorganic corrosion inhibitors on the rheology of self-compacting concrete

Cited by 29 publications

References 12 publications

Corrosion Inhibition Mechanism of Steel Reinforcements in Mortar Using Soluble Phosphates: A Critical Review

Corrosion Inhibition Mechanism of Steel Reinforcements in Mortar Using Soluble Phosphates: A Critical Review

Impact and corrosion resistances of duplex epoxy/enamel coated plates

Effects of Compound Rust Inhibitor on the Performance of Concrete with a Large Amount of Mineral Admixtures

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