Journal
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES
Volume 56, Issue 2, Pages 320-327Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S2070205120020215
Keywords
Ni-Co alloy coating; TiO2 concentration; current density; mechanical properties; corrosion-related properties
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The goal of the present investigation is to evaluate the influences of plating parameters such as TiO2 nanoparticles concentration in the plating bath and applied current density on the microstructure-related and mechanical properties as well as corrosion behavior of Ni-Co coatings. The coatings were fabricated by different current densities and TiO2 nanoparticles concentration over the range 2-8 A dm(-2) and 0-30 g/L, respectively. Results demonstrate that the incorporation of TiO2 nanoparticles into the plating bath coupled with the change in current density can deeply affect the microstructure-related, mechanical properties as well as corrosion resistance of Ni-Co coatings. According to the results, Ni-Co-20 g/L TiO2 coatings electroplated at current density of 4 A dm(-2) shows the superior properties. The synergistic effects of higher Co amount coupled with the higher volume fraction of TiO2 throughout the microstructure of the coating is responsible for the above-mentioned improvements.
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