Influence of corrosion inhibitors on two different concrete systems under combined chloride and carbonated environment

Tiwari, Ashish Kumar; Purnima,; Goyal, Shweta; Luxami, Vijay

doi:10.1016/j.istruc.2022.12.093

Cited by 13 publications

(2 citation statements)

References 84 publications

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“…As shown in Figure 9, the corrosion area rate exhibited an increasing trend with the increase in the number of NaCl F-C and NaCl D-A. This can be explained by the effect of NaCl action on the accelerated corrosion of steel pipes [35]. In terms of the corrosion inhibitors, the corrosion area rate of steel pipes decreased with an increase in corrosion inhibitors' dosages.…”

Section: The Tafel Curves Of Concrete-filled Steel Tubesmentioning

confidence: 83%

The Corrosion Resistance of Concrete-Filled Steel Tubes with the Assembly Unit of Na2MoO4 and Benzotriazole

Wang,

Xu,

et al. 2024

Coatings

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Steel pipes are commonly used to strengthen the concrete’s load-bearing capacity. However, they are prone to corrosion in salt erosion environments. In this study, the influence of Na2MoO4 and benzotriazole on concrete-filled steel tubes’ corrosion performance is investigated. The steel pipes’ mass loss rates (MRs), ultrasonic velocity, electrical resistance, and the AC impedance spectrum and Tafel curves of concrete-filled steel tubes were used to characterize the degree of corrosion in the steel pipes. Scanning electron microscopy–energy-dispersive spectrometry and X-ray diffraction were used for studying the composition of steel pipe rust. The research results revealed that the NaCl freeze–thaw cycles (F-C) and NaCl dry–wet alternation (D-A) actions had a reducing effect on the mass and ultrasonic velocity of the concrete-filled steel tubes. After 300 NaCl F-C and 30 NaCl D-A, the MRs were 0%~0.00470% and 0%~0.00666%. The corresponding ultrasonic velocities were 0%~21.1% and 0%~23.6%. When a rust inhibitor was added, the results were the opposite. The MRs decreased by 0%~80.3% and 0%~81.6% with the added Na2MoO4 and benzotriazole. Meanwhile, the corresponding ultrasonic velocities were 0%~8.1% and 0%~8.3%. The steel tubes were corroded after 300 NaCl F-C and 30 NaCl D-A. The addition of rust inhibitors improved the corrosion resistance of the concrete-filled steel tubes by increasing the electrical resistance before NaCl erosion. The corrosion area rate decreased by using the rust inhibitors. The corrosion resistance effect of benzotriazole was higher than that of Na2MoO4. The concrete-filled steel tube with an assembly unit comprising 5 kg/m3 of Na2MoO4 and 15 kg/m3 of benzotriazole had the best corrosion resistance under the erosion induced by NaCl F-C and D-A. Rust inhibitors reduced the content of iron-containing crystals and iron elements. The specimens with 5 kg/m3 Na2MoO4 and 15 kg/m3 benzotriazole had the lowest concentration of iron-containing crystals and iron elements.

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Section: The Tafel Curves Of Concrete-filled Steel Tubesmentioning

confidence: 83%

The Corrosion Resistance of Concrete-Filled Steel Tubes with the Assembly Unit of Na2MoO4 and Benzotriazole

Wang,

Xu,

et al. 2024

Coatings

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“…In a study on the accelerated corrosion by Kharma et al (2022), mass loss of 9 and 16.2% were noticed for a period of 48 and 96 days respectively [27].Recent study by Kumar Harish et al(2022) showed that Azadirachta indica leaves are very good anti-cracking, and antipitting agents for mild steel with 89.25% corrosion inhibition efficiency [28]. Considering the serious long term consequences of corrosion, researchers conduct many studies to reduce their effect on structures [29,30].Both synthetic and organic corrosion resistors are studied for their effectiveness in reducing corrosion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Structural Performance of Concrete Containing Cellulose Fibers and the Anti-corrosive Effect of Green Corrosion Inhibitors

Ramshankar,

Ganeshan,

Raja

et al. 2024

Civil and Environmental Engineering Reports

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This research was aimed to find the structural behaviour of Calotropis procera fibres added concrete and the effect of Azadirachta indica leaf slurry blended to concrete and exposed to seawater. Conventional and fibre reinforced concrete samples fabricated keeping the curing time as 7, 14 and 28 dayswere subjected to compression, split tensile, rebound hammer and ultrasonic pulse velocity test. Increase in curing time increased the structural properties and Calotropis procerafibres added samples produced respectively 19.5%, 15%, 10.3 and 14.5% improvement in the compression, tensile, rebound hammer and ultrasonic pulse velocity values. These fibres reduced the brittleness of the specimen and avoided unprecedented failures. Accelerated corrosion and gravimetric mass loss test conducted to estimate the anti-corrosive property of Azadirachta indica leaf slurry showed decrease in corrosion rate. The corrosion rate of concrete samples without and with inhibitors was 0.0654 ± 0.008 and 0.056 ± 0.011 mm/year respectively evincing the anti-corrosive effects of Azadirachta indica leaves. Thus green materials are compatible with concrete and can be used in making sustainable concrete structures.

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Inhibition Performance of Generic Compounds as Corrosion Inhibitor in Combined Chloride and Carbonation Environment

Tiwari,

Garhwal,

Garhwal

et al. 2023

Intelligent Computing and Optimization

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Influence of corrosion inhibitors on two different concrete systems under combined chloride and carbonated environment

Cited by 13 publications

References 84 publications

The Corrosion Resistance of Concrete-Filled Steel Tubes with the Assembly Unit of Na2MoO4 and Benzotriazole

The Corrosion Resistance of Concrete-Filled Steel Tubes with the Assembly Unit of Na2MoO4 and Benzotriazole

Experimental Investigation of the Structural Performance of Concrete Containing Cellulose Fibers and the Anti-corrosive Effect of Green Corrosion Inhibitors

Inhibition Performance of Generic Compounds as Corrosion Inhibitor in Combined Chloride and Carbonation Environment

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