Electrochemical and microstructural evaluation of acidification damage induced by impressed current cathodic protection after incorporating a hydroxy activated-Mg/Al-double oxide in the external anode mortar

Zhu, Ji-Hua; Mohamed, Ibrahim M.A.; Xing, Feng

doi:10.1016/j.conbuildmat.2021.125116

Cited by 6 publications

(4 citation statements)

References 76 publications

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“…Two surfaces of the concrete bridge were exposed to the electrolytic cells and the other surfaces were sealed with epoxy resin. A 40 mL chloride-contaminated (3.5 wt% NaCl) simulated concrete pore solution (the chemical compositions of the simulated concrete pore solution were consistent with our previous study [ 25 ]) was poured into the electrolytic cells. After that, the cathode cells were filled with the same volume (26 cm 3 ) of siliceous river sand, while the anode cells were filled with mixed aggregates; specific mix proportions of the aggregates in the anode cells are shown in Table 3 .…”

Section: Methodsmentioning

confidence: 88%

“…In our previous study, a novel type of lightweight functional aggregate (LFA) with low bulk resistivity and excellent acidification resistance was designed and prepared, and better polarizing stability and extended service life of the anode system were obtained [ 25 ]. The feasibility of enhancing the anode performance by acidification mitigation was proved, and this technical route has been tracked by relevant scholars [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Lightweight Functional Aggregates on the Mitigation of Anode Degradation of Impressed Current Cathodic Protection for Reinforced Concrete

Guo

Qin

2022

Materials

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The local acidification of secondary anode mortar was regarded as the primary reason for the degradation of the anode system, leading to a decreased service life and uneven distribution of the protection current within the impressed current cathodic protection system for reinforced concrete structures. In related previous studies, a novel type of lightweight functional aggregate was designed and prepared for the secondary anode mortar system, aiming to improve anode performance via acidification mitigation. However, the relationship between optimization effects and this functional component has not been fully clarified. In this study, two sets of experiments were carried out to investigate the effects of lightweight functional aggregates on acidification mitigation and the protection of current distribution. Research results proved that the presence of this functional aggregate was beneficial for mitigated acidification propagation and a more uniform distributed protection current, which demonstrated the importance and effectiveness of acidification inhibition on the optimization of anode performance.

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Section: Methodsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

The Effect of Lightweight Functional Aggregates on the Mitigation of Anode Degradation of Impressed Current Cathodic Protection for Reinforced Concrete

Guo

Qin

2022

Materials

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“…However, inaccurate settings of electrochemical parameters such as treatment duration and current density amplitude will result in negative effects on the RC structures. For instance, excessive long electrochemical treatment will cause local acidification of concrete cover and lead to calcium leaching in the vicinity of the anode area [83,84]. Meanwhile, a large current density will also produce a large amount of hydroxyl ions and even lead to the hydrogen evolution reaction on the electrode surface.…”

Section: Electrochemical Rehabilitations For Rc Structuresmentioning

confidence: 99%

Progress and research challenges in concrete durability: ionic transport, electrochemical rehabilitation and service life prediction

2022

RILEM Tech Lett

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Concrete durability degradation problems have received considerable attention in both research field and concrete industry during recent decades. To better understand the underlying mechanisms, various numerical models have been put forward aiming at widely concerned scientific issues involved in the entire life cycle of concrete structures: ionic transport in porous medium, degradations induced by multiple factors, as well as the prediction and rehabilitation method to prolong the service life. This letter aims to summarise the major contributions to these interrelated scientific issues particularly from the modelling perspective. The digital characterization of concrete heterogeneity and its influence on ionic transport behaviour will be firstly reviewed. Subsequently, concrete deterioration mechanisms induced by various factors and their internal coupling relationships are discussed in details. Meanwhile, promising electrochemical repair techniques with multi-fold advantages including chloride removal, corrosion inhibition, ASR mitigation and crack repair are systematically summarized. Finally, existing research gaps and future opportunities in these areas have also been visited, which is hoped to break the ice in this challenging field and promote the sustainable development of the concrete industry.

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“…In addition, the deposition of Co/Al or Fe-layered double hydroxides (LDHs) was introduced to electro-oxidize hydroxymethylfurfural [ 31 ]. The LDH materials have an interesting structure that has been reported for many chemical and electrochemical applications [ 32 , 33 ]. The reported approach based on LDHs focuses on potentiodynamic cathodic reduction.…”

Section: Introductionmentioning

confidence: 99%

Carboxymethyl-Cellulose-Containing Ag Nanoparticles as an Electrochemical Working Electrode for Fast Hydroxymethyl-Furfural Sensing in Date Molasses

Alqahtani

Alnemr

Shulaybi³

et al. 2022

Polymers

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Novel biosensors based on carboxymethyl cellulose extract from date palm fronds containing Ag nanoparticles as an electrochemical working electrode for fast hydroxymethylfurfural (HMF) sensing in date molasses were prepared. The morphological, structural, and crystallinity characteristics of the prepared Ag@CMC were described via SEM, DLS, TEM, and XRD. In addition, Raman spectroscopy and UV–VIS spectroscopy were performed, and thermal stability was studied. The investigated techniques indicated the successful incorporation of AgNPs into the CMC polymer. The sensing behavior of the prepared AgNPs@CMC electrode was studied in terms of cyclic voltammetry and linear scan voltammetry at different HMF concentrations. The results indicated high performance of the designed AgNPs@CMC, which was confirmed by the linear behavior of the relationship between the cathodic current and HMF content. Besides, real commercial samples were investigated using the novel AgNPs@CMC electrode.

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Electrochemical and microstructural evaluation of acidification damage induced by impressed current cathodic protection after incorporating a hydroxy activated-Mg/Al-double oxide in the external anode mortar

Cited by 6 publications

References 76 publications

The Effect of Lightweight Functional Aggregates on the Mitigation of Anode Degradation of Impressed Current Cathodic Protection for Reinforced Concrete

The Effect of Lightweight Functional Aggregates on the Mitigation of Anode Degradation of Impressed Current Cathodic Protection for Reinforced Concrete

Progress and research challenges in concrete durability: ionic transport, electrochemical rehabilitation and service life prediction

Carboxymethyl-Cellulose-Containing Ag Nanoparticles as an Electrochemical Working Electrode for Fast Hydroxymethyl-Furfural Sensing in Date Molasses

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