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Influence of CeO 2 and TiO 2 Particles on Physicochemical Properties of Composite Nickel Coatings Electrodeposited at Ambient Temperature.
- Source :
- Materials (1996-1944); Aug2022, Vol. 15 Issue 16, p5550-5550, 22p
- Publication Year :
- 2022
-
Abstract
- The Ni-TiO<subscript>2</subscript> and Ni-CeO<subscript>2</subscript> composite coatings with varying hydrophilic/hydrophobic characteristics were fabricated by the electrodeposition method from a tartrate electrolyte at ambient temperature. To meet the requirements of tight regulation by the European Chemicals Agency classifying H<subscript>3</subscript>BO<subscript>3</subscript> as a substance of very high concern, Rochelle salt was utilized as a buffer solution instead. The novelty of this study was to implement a simple one-step galvanostatic electrodeposition from the low-temperature electrolyte based on a greener buffer compared to traditionally used, aiming to obtain new types of soft-matrix Ni, Ni-CeO<subscript>2</subscript>, and Ni-TiO<subscript>2</subscript> coatings onto steel or copper substrates. The surface characteristics of electrodeposited nickel composites were evaluated by SEM, EDS, surface contact angle measurements, and XPS. Physiochemical properties of pure Ni, Ni-CeO<subscript>2,</subscript> and Ni-TiO<subscript>2</subscript> composites, namely, wear resistance, microhardness, microroughness, and photocatalytic activity, were studied. Potentiodynamic polarization, EIS, and ICP-MS analyses were employed to study the long-term corrosion behavior of coatings in a 0.5 M NaCl solution. Superior photocatalytic degradation of methylene blue, 96.2% after 6 h of illumination, was achieved in the case of Ni-TiO<subscript>2</subscript> composite, while no substantial change in the photocatalytic behavior of the Ni-CeO<subscript>2</subscript> compared to pure Ni was observed. Both composites demonstrated higher hardness and wear resistance than pure Ni. This study investigates the feasibility of utilizing TiO<subscript>2</subscript> as a photocatalytic hydrophilicity promoter in the fabrication of composite coatings for various applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 15
- Issue :
- 16
- Database :
- Complementary Index
- Journal :
- Materials (1996-1944)
- Publication Type :
- Academic Journal
- Accession number :
- 158891091
- Full Text :
- https://doi.org/10.3390/ma15165550