Electrochemical Corrosion Behavior of Ni–TiO2 Composite Coatings Electrodeposited from a Deep Eutectic Solvent-Based Electrolyte

The need to develop new electrochemical energy storage and conversion devices requires the creation of new, available, low-cost and high-performance electrocatalytic materials, which can be produced as coatings by electrodeposition technique. The electrodeposited composite coatings based on nickel s...

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Bibliographic Details
Published in:Coatings (Basel) 2022-06, Vol.12 (6), p.800
Main Authors: Protsenko, Vyacheslav S., Butyrina, Tetyana E., Bobrova, Lina S., Korniy, Sergiy A., Danilov, Felix I.
Format: Article
Language:English
Subjects:
Aqueous solutions
Coated electrodes
Corrosion currents
Corrosion effects
Corrosion potential
Corrosion resistance
Electrochemical corrosion
Electrochemical impedance spectroscopy
Electrode polarization
Electrodeposition
Electrodes
Electrolytes
Energy storage
Ionic liquids
Nickel
Plating
Protective coatings
Room temperature
Solvents
Spectrum analysis
Titanium dioxide
Viscosity
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Summary:The need to develop new electrochemical energy storage and conversion devices requires the creation of new, available, low-cost and high-performance electrocatalytic materials, which can be produced as coatings by electrodeposition technique. The electrodeposited composite coatings based on nickel seem to be very promising in this context. We studied the corrosion resistance of electrocatalytic Ni–TiO2 composite coatings fabricated by electrodeposition method using a plating solution based on deep eutectic solvents, a new environmentally friendly and affordable type of room-temperature ionic liquids. We investigated the corrosion behavior of Ni and Ni–TiO2 coatings (5 and 10 wt.% of TiO2) in a 3% NaCl aqueous solution as a corrosive medium. The corrosion parameters were determined by linear voltammetry and electrochemical impedance spectroscopy. It was established that the inclusion of titania particles in the Ni matrix and an increase in their content in the coating leads to a shift in corrosion potential towards positive values, a decrease in corrosion current density and an increase in polarization resistance. The observed effects of improving the corrosion resistance of coatings are associated with the barrier action of particles of the dispersed phase and the formation of corrosion microcells contributing to the inhibition of local corrosion.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12060800