Effect of TiO2 Concentration on Microstructure and Properties of Composite Cu–Sn–TiO2 Coatings Obtained by Electrodeposition

In this work, Cu–Sn–TiO2 composite coatings were electrochemically obtained from a sulfate bath containing 0–10 g/L of TiO2 nanoparticles. The effect of TiO2 particles on kinetics of cathodic electrodeposition has been studied by linear sweep voltammetry and chronopotentiometry. As compared to the C...

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Published inMaterials Vol. 14; no. 20; p. 6179
Main Authors Kasach, Aliaksandr A., Kharytonau, Dzmitry S., Paspelau, Andrei V., Ryl, Jacek, Sergievich, Denis S., Zharskii, Ivan M., Kurilo, Irina I.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 18.10.2021
MDPI
Subjects
antibacterial properties
Bacteria
Bacterial infections
Coated electrodes
composite coating
Copper
Copper base alloys
copper–tin alloy
Corrosion
Corrosion resistance
E coli
Electrochemical impedance spectroscopy
Electrode polarization
electrodeposition
Electrodes
Electrolytes
Linear polarization
Mechanical properties
Microorganisms
Morphology
Nanocomposites
Nanoparticles
Nonuniformity
Photocatalysis
Protective coatings
Severe acute respiratory syndrome coronavirus 2
Tin
titania
Titanium
Titanium dioxide
Netherlands
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Summary:In this work, Cu–Sn–TiO2 composite coatings were electrochemically obtained from a sulfate bath containing 0–10 g/L of TiO2 nanoparticles. The effect of TiO2 particles on kinetics of cathodic electrodeposition has been studied by linear sweep voltammetry and chronopotentiometry. As compared to the Cu–Sn alloy, the Cu–Sn–TiO2 composite coatings show rougher surfaces with TiO2 agglomerates embedded in the metal matrix. The highest average amount of included TiO2 is 1.7 wt.%, in the case of the bath containing 5 g/L thereof. Composite coatings showed significantly improved antibacterial properties towards E. coli ATCC 8739 bacteria as compared to the Cu–Sn coatings of the same composition. Such improvement has been connected with the corrosion resistance of the composites studied by linear polarization and electrochemical impedance spectroscopy. In the bacterial media and 3% NaCl solutions, Cu–Sn–TiO2 composite coatings have lower corrosion resistance as compared to Cu–Sn alloys, which is caused by the nonuniformity of the surface.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma14206179