The Creation of Nanocomposite Ni-B4C Coatings on Cu by Electrocodeposition and Investigation of Corrosion Behavior

Nowadays، nano composite coatings have created many applications in different industries with due to uniqe properties such as hardness، good wear resistance and high corrosion resistance. B4C particles are hard substance that they are used as a reinforced particle in electrodeposition process. The aim of this research is، investigation of various parameters on morphology، and corrosion resistance of Ni-B4C nano composite coatings. In this study، Ni-B4C nanocomposite coating was formed on copper substrate by direct current (DC) at Watts bath contained nickel sulfat (NiSO4. 6H2O)، Nickel Chloride (NiCl2. 6H2O)، Boric Acid (H3BO3) with Poly Vinyl Pirrolidone (PVP) and Sodium Dodecyl Sulfate (SDS) surfactants. The morphology of nanocomposite coatings were analyzed by scanning electron microscope (SEM) and field emission scanning electron microscope (FESEM). Also، corrosion resistance was measured by polarization test. The hardness of coatings were measured by micro hardness test. According to the results obtaining in this study، beyond of optimum condition، the concentration of B4C is 10 g/l، current density is 5A/dm2 and the electrodeposition time is 30 minute.