The surface of a material or component might be deemed, because of its atomic structure, to be the most vulnerable site for various forms of attack. Therefore it is necessary to take required actions in order to protect the surface of the components which is done in different ways. Electroplating method due to lower production costs, ease of production and ease of process control is of paramount importance. Many studies have been performed on the production of Ni electroplated coatings. In this respect, the use of silicon carbide particles as a reinforcing agent in nickel coating has attracted the attentions. In order to improve the tribological properties of the coating carbon, the graphite or carbon nanotubes have also been used. In most of the researches CNT and SiC have separately been used in nickel coating. In this study, The Ni-SiC composite coatings at three different concentrations of 5, 10 and 15 g/l of reinforcing particles were produced using an electroplating process onto an aluminum substrate. After finding the best sample considering resistance to wearing, impact of carbon nanotubes at a concentration of 2 and 6 g/L as strengthening agent along with SiC particles were investigated. Nano-hardness and wear resistance of the samples were examined. Surface and section of the Coatings and also wear scratches were examined using SEM. In order to investigate the effect of current density on the surface roughness, morphology of the substrate and nickel coatings at two different current densities of 3 A/dm 2 and 6 A/dm 2 were evaluated using AFM. Increasing the current density parameter from 3 A/dm 2 to 6 A/dm 2 did not cause a significant change in Ra parameter; only the overall shape of the surface topography changed. Increasing the concentration of SiC particles in the electrodeposition bath from 5 g /l (sample S5) to 10 g /l (sample S10), led to improved wear properties of the coating. The presence of carbon nanotubes on the surface of the coatings, led to an increase in the co-deposition of SiC particles from 17/64 vol.% in S10 sample (the sample produced in a 10 g/l SiC bath) to 20/27 vol.% in SC6 sample (the sample produced in a 10 g/l SiC and 6 g/l SiC bath), also CNT disturbed the distribution of SiC particles in the coating. Using CNT up to a certain extent along with SiC led to improved hardness and wear resistance of Ni-SiC coating; increasing CNT up to 6 g/l increased the hardness of S10 sample from 451 Vickers to 508 Vickers i n SC6 sample and also increased the elastic modulus from 145.49 GPa in S10 sample to 169.67 GPa in SC6 sample. Mass loss of SC6 sample was improved by 41.6 % after wear test in comparison with S10. Key words : nanocomposite coating. Electroplating, Nickel, Carbon nano tube, nanohardness