عنوان مقاله English
نویسندگان English
Copper is widely used in different industries due to its good thermal and electrical conductivity.However, it can be in contact with fluid environments in these applications and thus, its corrosion properties are also important. In this study, copper/silicon carbide nano-composite coatings were deposited on copper substrates from sulfate bath by pulsed current and different current densities. The effects of copper surface preparation and current density on grain size, morphology,hardness, porosity, and corrosion properties of the coatings were investigated. Results revealed that, surface preparation before electrodeposition leaded to more uniform and less defective coatings. Grain size and porosity percent were decreased by increasing of current density. However, incorporation of nano-particles was also decreased by increasing of current density. Therefore, the optimum peak current density was achieved at 12A.dm-2at whichthe highest micro-hardness and thelowestcorrosion rateof the coatingsrespectively193 Hv and 0.008mA/cm2 obtained
کلیدواژهها English