Abstarct: Fuel cell is one of the important renewable resources. One of the components of these cells is bipolar plates. These plates have a considerable effect on the weight, volume and the cost of these cells. According to the materials that used in their manufacturing, the bipolar plates categorize to: mextallic, composite and graphite plates. One of the disadvantages of composite and graphite plates is the higher weight and volume of cell’s stack because of small deformation ability and weak stampability property of these plates. So the industrial use of mextallic plates is usual. The disadvantages of mextallic plates are Low corrosion resistance in acidic environment, increasing of the interfacial contact resistance caused by presenting of the oxide laxyers on the surface of mextallic plates and creating of ionic contamination caused by corrosion products. In this study, the Inconel 625 is selected because of high corrosion resistance of this mextal. Interfacial contact resistance of the Inconel 625 is investigated in different temperatures. The results show that by increasing of temperature and time, the amount of interfacial contact resistance is increased. According to this test, the TiN coatings that is created by PVD (cathodic arc evaporation), cause that the corrosion resistance and interfacial contact resistance of samples are improved. X-Ray Fluorescence, X-Ray diffraction, Energy dispersive X-ray spectroscopy, Scanning electron microscopy and contact resistance and corrosion potentiodynamic polarization tests are used for investigating of samples. Totally, results show that the amount of the corrosion resistance and interfacial contact resistance of coated samples, are lower that amount that are reported by energy department of America. By the way, the corrosion resistance and interfacial contact resistance of sample with 1200 nm coating thickness and Ra= 400, are 0/1843 µA.cm-2 and 8/14 mΩ.cm2 respectively. This sample has the most suitable situation for using in fuel cells.