Experimental study on multi-component corrosion inhibitor for steel bar in chloride environment

Cui, Lei; Hang, Meiyan; Gao, Xiaojian; Gao, Xiaojian

doi:10.1016/j.conbuildmat.2021.125533

Cited by 46 publications

(13 citation statements)

References 55 publications

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“…The experiment shown in Figure 12 was conducted to further investigate the corrosion rate of aluminium in different chlorides content environments. Polarization curve of aluminium in different chloride content were measured and the characteristic parameters were used to quantitatively describe the corrosion rate of aluminium [26,27]. The weight percentages of chloride ion in electrolytes were 0.6, 1.2 and 1.8 wt%, respectively and the solutions were neutral.…”

Section: The Effect Of Chlorides On the Polarization Curve Of Aluminiummentioning

confidence: 99%

Analysis for metal sheath corrosion rate in AC high voltage power cable

Lai

Liu³

et al. 2022

IET Generation Trans & Dist

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Reliable power transmission requires the safe operation of high-voltage cable. A number of high-voltage cable failures caused by aluminium sheath corrosion has been reported these years. However, neither discussion on factors influencing corrosion rate nor specification describing corrosion inhibiting method has been presented. Thus, it is crucial to address the research gap in evaluating corrosion rate of aluminium sheath in various corrosive environments. Here, the effect of chlorides on aluminium sheath corrosion is analyzed. Using scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS), the corroded surface is investigated. Titration experiment is performed to quantify the chlorides content in buffer layer of cable. Polarization curves are employed to analyze the corrosion rate of aluminium sheath in different chlorides content environment. Surface analysis result shows that chlorine-rich phase can be observed on the corroded surface. Titration experiment result reveals that buffer layer used in high voltage cable is one of the sources of chlorides content which varies from 0.7 to 4.2 wt%. Finally, polarization curve shows that when chloride content increases from 0.6 to 1.8 wt%, the pitting potential left shifts from −0.689 to −0.742 V. The corrosion resistance of aluminium sheath deteriorates significantly with the increase of chlorides content.

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Section: The Effect Of Chlorides On the Polarization Curve Of Aluminiummentioning

confidence: 99%

Analysis for metal sheath corrosion rate in AC high voltage power cable

Lai

Liu³

et al. 2022

IET Generation Trans & Dist

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“…In our previous research, a multi-component corrosion inhibitor was successfully prepared, and its inhibition properties and synergistic mechanisms were investigated [27]. Multi-component corrosion inhibitors are a new trend in the field of electromigration inhibitor research, which could combine the advantages of the quick absorption of the organic and the excellent long-term performance of the inorganic [11,28].…”

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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“…Resistance-reducing agent (RRA) has a good effect of reducing soil resistivity and slowing down corrosion (Cui et al , 2021; Li and Castaneda, 2017). Physical RRA (Syafiqah Mohd Azmi et al , 2022) based on bentonite is widely used because it was beneficial to reduce resistivity and weaken the corrosion effect.…”

Section: Introductionmentioning

confidence: 99%

Weak impact of underground water on corrosion inhibition of resistance-reducing agent

Liu

Yang

et al. 2023

ACMM

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Purpose The purpose of this paper is to study the corrosion behavior of Q235 steel in the bentonite-based resistance-reducing agent (RRA) with different infiltration rates of underground water. Design/methodology/approach The corrosion behavior of the steel in underground water was assessed by weight loss experiment, electrochemical impedance spectroscopy and polarization curve. Findings The results showed that the corrosion rate of the steel in the RRA pastes was much lower than that in the original acidic soil. The underground water infiltration slightly accelerated the corrosion rate of the steel in the RRA pastes, but the acceleration role is weak. The bentonite-based RRA can be compatibly applied in the acidic soil. Originality/value The bentonite-based RRA can significantly reduce the corrosion rate of the steel and is suitable to compatibly apply in the acidic soil.

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Experimental study on multi-component corrosion inhibitor for steel bar in chloride environment

Cited by 46 publications

References 55 publications

Analysis for metal sheath corrosion rate in AC high voltage power cable

Analysis for metal sheath corrosion rate in AC high voltage power cable

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

Weak impact of underground water on corrosion inhibition of resistance-reducing agent

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