In this research, the NiAl intermetallic compound was created by applying the bond alloy nickel – aluminum and commercially pure wire on Inconel 718. In order to cover the subsurface of Inconel 718, the gas tungsten arc welding process was used. The variations of parameters in this operation are current, voltage and gas flow. According to selected arrays in Taguchi experimental design, the total numbers of 9 tests were performed. Then, in order to obtain the optimum parameters, all of the samples were examined under wear and hardness tests. The optimum parameters for current, voltage and gas flow were obtained equal 90A, 15V and 12 lit/min, respectively. In the following an experiment was done according to optimum parameters. Furthermore, the effect of each parameter on results of hardness and abrasion was studied. The morphology and chemical composition of the produced coating with optimized parameters were studied using optical microscopy, scanning electron microscopy, EDS and XRD analysis. The main reason of different elements diffusion from substrate into the coating was dilution. The results shown, diffusion caused the changes in the structures and phases of the coating. In addition, the oxidation behavior of optimum sample was compared with two other samples obtained from previous examinations. The obtained results indicated the less oxide layer formation and better parabolic behavior in optimum sample. Abrasive tests in both ambient temperature and 400 ° C were carried out by a pin on disk. The results demonstrated that the oxide dense layer was formed in 400 ° C and it was not observed a significant weight loss in this temperature than ambient temperature. Keywords: Experimental design, NiAl intermetallic compounds, Cladding, Oxidation, High temperature wear.