en Research Paper Research Paper <span style="font-size:12pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">In this research study, a composite coating of </span><a name="_Hlk174618415"><span style="background-color:#ffffff;">Ni-Co/SiC-CeO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;"> </span></a><span style="background-color:#ffffff;">was </span></span></span><span lang="EN-US" style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">prepared </span></span></span><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">on a copper substrate using the </span><a name="_Hlk174294466"></a><a name="_Hlk174293776"><span style="background-color:#ffffff;">pulse </span></a></span></span><span lang="EN-US" style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">electrodeposition</span></span></span><span style="background-color:#ffffff;"> </span><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">technique. </span></span></span><span lang="EN-US" style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">The effects of electrodeposition parameters, including </span><a name="_Hlk174294502"><span style="background-color:#ffffff;">current density, duty cycle, and frequency</span></a><span style="background-color:#ffffff;">, on the properties of the prepared coating were investigated</span></span></span><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">. The selected current density values were 0.1, 0.2, and 0.3 A/cm</span>^{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">, </span><span style="background:aqua"><span style="background-color:#ffffff;">the</span></span><span style="background-color:#ffffff;"> duty cycle options were 10, 20, and 30%, and the frequency values were 10, 100, and 1000 Hz. </span><span style="background:aqua"><span style="background-color:#ffffff;">Increasing the current density enhanced the microhardness of the coating but reduced its corrosion resistance.</span></span><span style="background-color:#ffffff;"> 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. </span></span></span><span lang="EN-US" style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">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</span></span></span><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">. Furthermore, higher frequencies were found to be associated with increased microhardness and improved corrosion resistance of the coatings. The coatings </span></span></span><span lang="EN-US" style="font-size:11.0pt"><span style="background:aqua"><span style="line-height:200%"><span style="background-color:#ffffff;">with the highest corrosion resistance exhibited</span></span></span></span><span style="background-color:#ffffff;"> </span><span style="font-size:11.0pt"><span style="line-height:200%"><span style="background-color:#ffffff;">a corrosion current density of 0.29 &micro;A/cm</span>^{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;"> and a polarization resistance of 1063 &Omega;.cm</span>^{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;"> in a 3.5% NaCl solution. These coatings were prepared using a current density of 0.2 A/cm</span>^{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">, a duty cycle of 10%, and a frequency of 1000 Hz.</span></span></span></span></span></span><br> <br> <span style="background-color:#ffffff;">&nbsp;</span> Ni-Co/SiC-CeO2 coatings,Current density,Duty cycle,Frequency,Corrosion resistance 79 90 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5493-1&slc_lang=en&sid=1 Mehdi Mehranian mahdi.mehranian@gmail.com 1800319475328460018984 1800319475328460018984 No Materials Engineering Department, Faculty of Engineering, Shahrekord University, Shahrekord, Iran Hajar Ahmadimoghadam hajar.ahmadi@sku.ac.ir 1800319475328460018985 1800319475328460018985 Yes Materials Engineering Department, Faculty of Engineering, Shahrekord University, Shahrekord, Iran