Effect of Pulse Electrodeposition Parameters on the Properties of Ni-Co/SiC-CeO2 Composite Coatings on Copper Substrates

Mehranian, Mehdi; Ahmadimoghadam, Hajar

doi:10.22068/ijmse.3745

Volume 21, Issue 4 (December 2024) IJMSE 2024, 21(4): 79-90 | Back to browse issues page

‎ 10.22068/ijmse.3745

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Mehranian M, Ahmadimoghadam H. Effect of Pulse Electrodeposition Parameters on the Properties of Ni-Co/SiC-CeO2 Composite Coatings on Copper Substrates. IJMSE 2024; 21 (4) :79-90
URL: http://ijmse.iust.ac.ir/article-1-3745-en.html

Effect of Pulse Electrodeposition Parameters on the Properties of Ni-Co/SiC-CeO2 Composite Coatings on Copper Substrates

Mehdi Mehranian

, Hajar Ahmadimoghadam

Abstract: (2200 Views)

In this research study, a composite coating of Ni-Co/SiC-CeO₂ was prepared on a copper substrate using the pulse electrodeposition technique. The effects of electrodeposition parameters, including current density, duty cycle, and frequency, on the properties of the prepared coating were investigated. The selected current density values were 0.1, 0.2, and 0.3 A/cm², the duty cycle options were 10, 20, and 30%, and the frequency values were 10, 100, and 1000 Hz. Increasing the current density enhanced the microhardness of the coating but reduced its corrosion resistance. This behavior can be attributed to the grain refinement occurring within the coating as the current density increases. On the other hand, an increase in duty cycle resulted in a decrease in microhardness, which can be attributed to a decrease in the concentration of nanoparticles within the coating. The lower corrosion resistance observed at higher duty cycles could be attributed to the decrease in off-time, causing the pulse electrodeposition conditions to approach a DC (direct current) state. Furthermore, higher frequencies were found to be associated with increased microhardness and improved corrosion resistance of the coatings. The coatings with the highest corrosion resistance exhibited a corrosion current density of 0.29 µA/cm² and a polarization resistance of 1063 Ω.cm² in a 3.5% NaCl solution. These coatings were prepared using a current density of 0.2 A/cm², a duty cycle of 10%, and a frequency of 1000 Hz.

Keywords: Ni-Co/SiC-CeO2 coatings, Current density, Duty cycle, Frequency, Corrosion resistance