Eco-friendly preparation of nanocrystalline Fe-Cr alloy coating by electrodeposition in deep eutectic solvent without any additives for anti-corrosion

Wang, Zhiwei; Wu, Teng; Ru, Juanjian; Ye, Hua; Bu, Jiaojiao; Wang, Ding

doi:10.1016/j.surfcoat.2020.126636

Cited by 18 publications

(5 citation statements)

References 42 publications

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“…Using Ni as a working electrode, the CV curves of Cr and Co in Figure 3d allow the identification of the reduction zones occurring during the co-deposition of Cr-Co at a 1:2 molar ratio, with EG:H 2 O HBD at a 3:1 molar ratio, and hydrated Cr (III) and Co (II) chloride salts. The Cr precursor requires two changes in oxidation state before reaching the Cr (0) metallic state [25], and the Co precursor requires a single change in oxidation state to reach the Co (0) metallic state [26], which can be seen in the reduction regions in the CV curve in Figure 3d. In the first reduction zone, R 1 , in the range 0.10 to −0.40 V, only a change from Cr (III) to Cr (II) oxidation states occurs, while in the second reduction zone, R 2 , in the range −0.75 to −1.15 V, a second reduction from Cr (II) to Cr (0) and a direct reduction from Co (II) to Co (0) oxidation states happen simultaneously.…”

Section: Electrochemical Studymentioning

confidence: 99%

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Velázquez-González,

Martínez-Baltodano,

López-Cuevas

et al. 2024

Metals

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The electrochemical co-deposition of Cr-Co oxide coatings at room temperature on 304 stainless steel (SS) was studied using an electrolyte composed of a mixture of ethylene glycol (EG), hydrated metal chloride salts (MCln∙YH2O), and water as a secondary hydrogen donor (HBD). Metallic Cu and Ni undercoats were applied to improve the adhesion of a posterior Cr-Co metallic and oxide layer. The electroactive events that took place during both electrodeposition processes were studied using cyclic voltammetry (CV) and chronoamperometry. The microstructure and composition of the surface layers were studied using scanning electron microscopy (SEM/EDS), X-ray diffraction (XRD) and cross-sectional elemental mapping via transmission electron microscopy (TEM). The surface of steel with the Cr-Co:EG-H2O coating showed greater resistance to pitting corrosion (123.93 mV) compared to untreated stainless steel (62.3 mV). This sample showed a large hystere-sis area, which is associated with high resistance to pitting corrosion by the occurrence of a re-passivation of the sample at a Erep value of 24.31 mV. After the cyclic potentiodynamic polariza-tion (CPP) test, the lowest specific mass loss (0.001 mg/cm2) was achieved for the AISI 304 SS sample coated using EG-water solvents (Cr-Co:EG-H2O), while the untreated AISI 304 SS reached a higher specific mass loss (0.01 mg/cm2). The Electrochemical Impedance Spectroscopy (EIS) tests showed that the uniform corrosion resistance varied significantly from the untreated AISI 304 SS (35 kΩ) to the coated sample (57 kΩ), which is attributed to the protection provided by the chromium and cobalt oxides coating. The best corrosion resistance achieved was correlated with a superhydrophobic character (with a contact angle of 158.41°) of the Cr-Co coatings. This was in turn a consequence of a needle-like morphology characteristic of these oxides.

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Section: Electrochemical Studymentioning

confidence: 99%

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Velázquez-González,

Martínez-Baltodano,

López-Cuevas

et al. 2024

Metals

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“…And then, the interaction force between ions is correspondingly strong, conducing to slow migration rate of ions in the solution. 38 Therefore, smooth and compact coatings are formed (Figs. 7a 1 and 7a 2 ).…”

Section: Electrochemical Analysismentioning

confidence: 99%

Eco-Friendly Electrodeposition of Al-Zn Alloy from AlCl₃-Urea Deep Eutectic Solvent

Chen,

Xu,

et al. 2024

J. Electrochem. Soc.

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The electrodeposition of Al-Zn alloy from an aluminium chloride-urea (AlCl3-urea) deep eutectic solvent (DES) containing 0.1 M ZnCl2 near room temperature was investigated. Cyclic voltammetry demonstrates that Al and Zn can be co-deposited, but the presence of Zn(II) restrains the reduction of Al(III). Linear sweep voltammetry reveals that increasing temperature facilitates the reduction of Zn(II) and Al(III), but the promotion effect on the Zn(II) reduction is greater than that on Al(III) reduction. Chronoamperometry analysis indicates that the electrocrystallization of Al-Zn alloy on a glassy carbon electrode follows instantaneous nucleation, which is similar to that of pure Al. Scanning electron microscopy shows that the obtained alloy coating is smooth but not compact. With the increase of temperature, the content of Zn in deposits increases, the grain grows up and the microstructure transforms from granular to cluster structure. Energy-dispersive spectroscopy and X-ray diffraction analysis prove that the deposits are pure Al-Zn alloy and composed of α phase and η phase. Tafel polarization test confirms the as-prepared alloy coating with higher Zn content (45 wt.%) possesses excellent corrosion resistance. All these findings promise an eco-friendly and simple route to produce the Al-Zn alloy coating with excellent corrosion resistance near room temperature.

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“…The electrodeposition and electrochemical behavior of alloys in DESs have been extensively addressed, such as Fe-Cr [ 155 , 156 ], Cu-Au [ 157 ], Ni-Mo [ 158 ], Au-Pt [ 159 ], Ni-Co [ 160 ], Cu-Sn [ 164 ], Zn-Sn [ 165 ], Pd-Co [ 161 ], and Co-Pt [ 162 ]. The electrodeposition of more than one metal often forms different structures and properties [ 166 , 167 ].…”

Section: Design Strategy and Application Of Des For Nanomaterials Fab...mentioning

confidence: 99%

“…It has been reported that the ultimate aprotic liquids (e.g., DESs) for the electrodeposition of alloys can avoid the hydrogen evolution issue that limits the potential application of an aqueous solution [ 55 , 140 ]. Recently, the nanoscale Fe-Cr alloy was achieved by electrodeposition in ChCl-EG without adding any additives ( Figure 6 a) [ 155 , 156 ]. CrCl 3 .6H 2 O and FeCl 2 .4H 2 O were dissolved in ChCl-EG DES.…”

Section: Design Strategy and Application Of Des For Nanomaterials Fab...mentioning

confidence: 99%

Design Strategy and Application of Deep Eutectic Solvents for Green Synthesis of Nanomaterials

et al. 2023

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The first report of deep eutectic solvents (DESs) was released in 2003 and was identified as a new member of ionic liquid (IL), involving innovative chemical and physical characteristics. Using green solvent technology concerning economical, practical, and environmental aspects, DESs open the window for sustainable development of nanomaterial fabrication. The DESs assist in different fabrication processes and design nanostructures with specific morphology and properties by tunable reaction conditions. Using DESs in synthesis reactions can reduce the required high temperature and pressure conditions for decreasing energy consumption and the risk of environmental contamination. This review paper provides the recent applications and advances in the design strategy of DESs for the green synthesis of nanomaterials. The strategy and application of DESs in wet-chemical processes, nanosize reticular material fabrication, electrodeposition/electrochemical synthesis of nanostructures, electroless deposition, DESs based nano-catalytic and nanofluidic systems are discussed and highlighted in this review.

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Eco-friendly preparation of nanocrystalline Fe-Cr alloy coating by electrodeposition in deep eutectic solvent without any additives for anti-corrosion

Cited by 18 publications

References 42 publications

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Eco-Friendly Electrodeposition of Al-Zn Alloy from AlCl₃-Urea Deep Eutectic Solvent

Design Strategy and Application of Deep Eutectic Solvents for Green Synthesis of Nanomaterials

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Eco-friendly preparation of nanocrystalline Fe-Cr alloy coating by electrodeposition in deep eutectic solvent without any additives for anti-corrosion

Cited by 18 publications

References 42 publications

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Cr-Co Oxide Coatings Resistant to Corrosion, Electrodeposited on 304 SS Using an Ethylene Glycol-Water Solvent

Eco-Friendly Electrodeposition of Al-Zn Alloy from AlCl3-Urea Deep Eutectic Solvent

Design Strategy and Application of Deep Eutectic Solvents for Green Synthesis of Nanomaterials

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Eco-Friendly Electrodeposition of Al-Zn Alloy from AlCl₃-Urea Deep Eutectic Solvent