Effects of heat treatment on the properties of Co–P–TiO₂ nanocomposite coatings

Abstract

The effects of heat treatment on the properties of electrodeposited Co-P-TiO 2 nanocomposite coatings were systematically investigated. The TiO 2 nanoparticles-reinforced Co-P-TiO 2 nanocomposites were heat-treated at different temperatures. Thermal analysis was conducted to characterize the structural transitions. The phase constituents and surface morphology of nanocomposites were identified. The mechanical properties including microhardness and wear tests were examined, and the electrochemical behaviour of Co-P-TiO 2 was determined. At the increasing heating temperature, the structure of Co-P-TiO 2 was gradually changed from amorphous into crystalline, with its surface morphology being smoother. Proper heat treatment can significantly improve the mechanical properties and corrosion resistance of coatings. When Co-P-TiO 2 coating was heat-treated at 350°C, a smooth and flat surface morphology was obtained and optimal physicochemical performance among the examined coatings was achieved.

Enhanced mechanical properties and corrosion resistance of electro-deposited NiCoP composite coatings with ZrB2 particle addition

“…With the increasing demand for protective coatings used in harsh working conditions, the co-deposition of second-phase particles into the nickel-based coatings provides a viable route to enhance the corrosion and tribological properties of the composite coatings [28][29][30]. These second-phase particles can be hard particles, such as Si 3 N 4 [31], Al 2 O 3 [32], TiO 2 [33], CeO 2 [34], SiO 2 [35] and SiC [36,37], which would enhance the wear resistance of nickel-based coatings. The reinforcements can either be lubricant particles, including MoS 2 [28], carbon nanotube [38], graphite [39], graphite oxide [37] et al which would decrease the friction coefficient of the composite coatings.…”

Wear behaviour of different nano particles coating on Al6061 substrate

“…Ardakani et al [24] found higher hardness and lower corrosion resistance using SiO 2 and Al 2 O 3 particles together in Ni–P coating on Al6061 substrate material. The use of TiO 2 particle-based coatings has found to be more effective in water and air remediation applications [25,26].…”

Ti/SnO2-Sb2Ox-TiO2 Electrodeposited from Methanesulfonate Electrolytes: Preparation, Properties, and Performance

“…Wu et al [14] prepared a high-performance duplex-structured Ti/SnO 2 -Sb 2 O x -CNT composite anode using the electrodeposition method. In our recent studies, a sol-enhanced electrodeposition method has been proposed to efficiently dope inert nanoparticles and achieve their well-dispersion into the coating [15][16][17][18], which can serve as a promising method for Ti/SnO 2 -Sb 2 O x modification.…”