Corrosion resistant performance of a chemical quenched rebar in concrete

Wei, Jie; Dong, Jie; Ke, Wei

doi:10.1016/j.conbuildmat.2010.09.029

Cited by 23 publications

(14 citation statements)

References 19 publications

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“…An equivalent electrical circuit with one time constants, as shown in Fig. 4, is proposed to simulate the electrochemical process of steels which has been used by other authors [35]. In Fig.…”

Section: Eismentioning

confidence: 99%

Corrosion behavior of Cr modified HRB400 steel rebar in simulated concrete pore solution

Liu

Cheng

et al. 2015

Construction and Building Materials

109

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Section: Eismentioning

confidence: 99%

Corrosion behavior of Cr modified HRB400 steel rebar in simulated concrete pore solution

Liu

Cheng

et al. 2015

Construction and Building Materials

109

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“…As is well known, the scale of hot-rolled mild steel consists of oxide phases, including wü stite (FeO), magnetite/ maghemite (Fe 3 O 4 /g-Fe 2 O 3 ) and hematite (a-Fe 2 O 3 ) (Wei et al, 2010;Wei J. et al, 2011;Sun et al, 2003), and even fayalite (2FeO · SiO 2 ) (Burke and Higginson, 2000). Fe 2 O 3 is the most compact among FeO, Fe 3 O 4 and Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of water‐cooled rebar quenched in a novel agent

Wei

2013

Anti-Corrosion Methods and Materials

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Purpose -The purpose of the investigation was to research the corrosion resistance of water-cooled rebar quenched in a novel agent (CQ) named CQ-cooled rebar. Design/methodology/approach -Water-cooled rebar was quenched in CQ about 1 s, then cooled in air. The corrosion resistance of water-cooled rebar and CQ-cooled rebar was evaluated by atmospheric exposure (AE) and wet/dry cyclic accelerated corrosion tests (CCT). The electrochemical properties of the two rebar scales were researched using electrochemical tests, and their compositions and structure were examined using XRD, SEM and FT-IR. Findings -The corrosion tests showed that the corrosion resistance of CQ-cooled rebar was better than that of water-cooled rebar. The electrochemical tests indicated that the CQ-cooled rebar scale had a higher corrosion potential, a lower corrosion current density and a higher polarization resistance. The thickness of the scale was 56 mm for CQ-cooled rebar, and 29 mm for water-cooled rebar. The phase constitution of the two scales comprised Fe 2 O 3 , Fe 3 O 4 , 2FeO· SiO 2 and FeO, but the mass ratio of Fe 2 O 3 and Fe 3 O 4 to 2FeO· SiO 2 and FeO, called protective ability index of the scale (PAIS), changed from 0.45 for water-cooled rebar to 24 for CQ-cooled rebar. Originality/value -The results clarified the role of CQ-quenching in improving the corrosion resistance of water-cooled rebar, which was to generate thick and compact Fe 3 O 4 and Fe 2 O 3 layers over the rebar substrate, and retard the anodic dissolution and cathodic hydrogen evolution reaction.

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“…However, in recent years, the usage of crushed and washed sea sand mixtures in concrete has led to a scarcity of natural aggregates, such as river gravel and sand [ 5 , 6 ]. Particularly, in terms of sea sand, the presence of chloride ions in the form of NaCl and MgCl 2 destabilizes the passive films around the embedded rebars, leading to the corrosion of the rebars from the electrochemical potential [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Corrosion Behavior of Reinforced Concrete with an Inhibitor by Electrochemical Impedance Spectroscopy

Park

Jung

2021

Materials

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In this study, the effect of NaCl and LiNO2 content on the deterioration of embedded rebars in concrete due to corrosion was examined by measuring the natural potential and impedance. Wet–dry cycles were performed to accelerate the corrosion of embedded rebars in reinforced concrete, following which the potential and impedance corresponding to the cycles were measured. For the reinforced concrete containing only NaCl, the passive film of the embedded rebar surfaces deteriorated after two weeks of accelerated corrosion, and its polarization resistance decreased. When 0.6 M LiNO2 per NaCl was added, the reinforced concrete deteriorated at the same rate as the normal embedded rebars, and the polarization resistance was higher than the initial values. When 1.2 M LiNO2 per NaCl was added, the passive film of the embedded rebars remained intact even after 10 weeks of accelerated corrosion, protecting the rebars from deterioration.

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Corrosion resistant performance of a chemical quenched rebar in concrete

Cited by 23 publications

References 19 publications

Corrosion behavior of Cr modified HRB400 steel rebar in simulated concrete pore solution

Corrosion behavior of Cr modified HRB400 steel rebar in simulated concrete pore solution

Corrosion resistance of water‐cooled rebar quenched in a novel agent

Evaluation of the Corrosion Behavior of Reinforced Concrete with an Inhibitor by Electrochemical Impedance Spectroscopy

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