TY  - JOUR
AU  - Bucko, Mihael
AU  - Bastos, Alexandre C.
AU  - Yasakau, Kiryl A.
AU  - Ferreira, Mario G. S.
AU  - Bajat, Jelena
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4436
AB  - Deep eutectic solvents have been widely acknowledged as ionic liquid analogues, since they share many characteristics and properties with ionic liquids. The two major application areas of deep eutectic solvents have been metal processing and synthesis media; however, plenty of other applications have already been reported and predicted for these liquids. Reline, an eutectic mixture of choline chloride and urea, is a well known representative of deep eutectic solvents. Despite their importance in the contemporary technologies, the knowledge about the corrosivity of deep eutectic solvents is remarkably scarce. This article reports the results on the corrosivity of reline towards two Al alloys, namely AA2024-T6 and AA6065-T6. To measure the corrosion rates and characterize the passive film on the alloys in reline, electrochemical impedance and inductively coupled plasma optical emission spectroscopy methods were used, and the corrosion product composition was analyzed by X-ray photoelectron spectroscopy. Surface morphology and Volta potential were imaged by scanning electron microscopy, atomic force microscopy and scanning Kelvin probe force microscopy. The corrosion tests show that the two alloys are extremely stable in reline, and the passive layer is formed in the first three hours of immersion in the corrosive media. There is no evidence that electrolyte species are incorporated into the Al oxide protective layer through chemical bonding.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Corrosion behavior of AA2024-T6 and AA6065-T6 alloys in reline
VL  - 357
DO  - 10.1016/j.electacta.2020.136861
ER  - 

@article{
author = "Bucko, Mihael and Bastos, Alexandre C. and Yasakau, Kiryl A. and Ferreira, Mario G. S. and Bajat, Jelena",
year = "2020",
abstract = "Deep eutectic solvents have been widely acknowledged as ionic liquid analogues, since they share many characteristics and properties with ionic liquids. The two major application areas of deep eutectic solvents have been metal processing and synthesis media; however, plenty of other applications have already been reported and predicted for these liquids. Reline, an eutectic mixture of choline chloride and urea, is a well known representative of deep eutectic solvents. Despite their importance in the contemporary technologies, the knowledge about the corrosivity of deep eutectic solvents is remarkably scarce. This article reports the results on the corrosivity of reline towards two Al alloys, namely AA2024-T6 and AA6065-T6. To measure the corrosion rates and characterize the passive film on the alloys in reline, electrochemical impedance and inductively coupled plasma optical emission spectroscopy methods were used, and the corrosion product composition was analyzed by X-ray photoelectron spectroscopy. Surface morphology and Volta potential were imaged by scanning electron microscopy, atomic force microscopy and scanning Kelvin probe force microscopy. The corrosion tests show that the two alloys are extremely stable in reline, and the passive layer is formed in the first three hours of immersion in the corrosive media. There is no evidence that electrolyte species are incorporated into the Al oxide protective layer through chemical bonding.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Corrosion behavior of AA2024-T6 and AA6065-T6 alloys in reline",
volume = "357",
doi = "10.1016/j.electacta.2020.136861"
}

Bucko, M., Bastos, A. C., Yasakau, K. A., Ferreira, M. G. S.,& Bajat, J.. (2020). Corrosion behavior of AA2024-T6 and AA6065-T6 alloys in reline. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 357.
https://doi.org/10.1016/j.electacta.2020.136861

Bucko M, Bastos AC, Yasakau KA, Ferreira MGS, Bajat J. Corrosion behavior of AA2024-T6 and AA6065-T6 alloys in reline. in Electrochimica Acta. 2020;357.
doi:10.1016/j.electacta.2020.136861 .

Bucko, Mihael, Bastos, Alexandre C., Yasakau, Kiryl A., Ferreira, Mario G. S., Bajat, Jelena, "Corrosion behavior of AA2024-T6 and AA6065-T6 alloys in reline" in Electrochimica Acta, 357 (2020),
https://doi.org/10.1016/j.electacta.2020.136861 . .

TY  - JOUR
AU  - Bucko, M.
AU  - Roy, S.
AU  - Valverde-Armas, P.
AU  - Onjia, Antonije
AU  - Bastos, Alexandre C.
AU  - Bajat, Jelena
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3900
AB  - This work investigates the electrochemical role of water in the research of deep eutectic solvent (DES) based on urea and choline chloride. The motivation comes from the growing use of this DES, and on reports where a characteristic voltammetric cathodic pre-wave is observed. However, there has been no direct study to verify if such interpretation of the pre-wave is appropriate. In this regard, cyclic voltammetry has been used in this paper to interrogate the reactions inducing the appearance of the pre-wave. These experiments have been carried out using reline (the eutectic mixture of urea and choline chloride) melts containing different amounts of water, compounds which can be incorporated as impurities from air, or as decomposition products of reline. The analyses showed that a pre-wave in voltammograms in reline originates from water electroreduction accompanied with a subsequent choline hydroxide formation. In this sense, reline behaves like a typical mixture of organic solvent + alkali cation salt + water. The voltammetric signal depends on water content in reline. Importantly, this offers a possibility for in-situ electrochemical determination of water content in reline, provided that a calibration curve is constructed.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea
EP  - H1065
IS  - 16
SP  - H1059
VL  - 165
DO  - 10.1149/2.0921816jes
ER  - 

@article{
author = "Bucko, M. and Roy, S. and Valverde-Armas, P. and Onjia, Antonije and Bastos, Alexandre C. and Bajat, Jelena",
year = "2018",
abstract = "This work investigates the electrochemical role of water in the research of deep eutectic solvent (DES) based on urea and choline chloride. The motivation comes from the growing use of this DES, and on reports where a characteristic voltammetric cathodic pre-wave is observed. However, there has been no direct study to verify if such interpretation of the pre-wave is appropriate. In this regard, cyclic voltammetry has been used in this paper to interrogate the reactions inducing the appearance of the pre-wave. These experiments have been carried out using reline (the eutectic mixture of urea and choline chloride) melts containing different amounts of water, compounds which can be incorporated as impurities from air, or as decomposition products of reline. The analyses showed that a pre-wave in voltammograms in reline originates from water electroreduction accompanied with a subsequent choline hydroxide formation. In this sense, reline behaves like a typical mixture of organic solvent + alkali cation salt + water. The voltammetric signal depends on water content in reline. Importantly, this offers a possibility for in-situ electrochemical determination of water content in reline, provided that a calibration curve is constructed.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea",
pages = "H1065-H1059",
number = "16",
volume = "165",
doi = "10.1149/2.0921816jes"
}

Bucko, M., Roy, S., Valverde-Armas, P., Onjia, A., Bastos, A. C.,& Bajat, J.. (2018). Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 165(16), H1059-H1065.
https://doi.org/10.1149/2.0921816jes

Bucko M, Roy S, Valverde-Armas P, Onjia A, Bastos AC, Bajat J. Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea. in Journal of the Electrochemical Society. 2018;165(16):H1059-H1065.
doi:10.1149/2.0921816jes .

Bucko, M., Roy, S., Valverde-Armas, P., Onjia, Antonije, Bastos, Alexandre C., Bajat, Jelena, "Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea" in Journal of the Electrochemical Society, 165, no. 16 (2018):H1059-H1065,
https://doi.org/10.1149/2.0921816jes . .