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CrN thick coatings were deposited by using a homemade high-density arc ion plating system under different nitrogen partial pressure.X-ray diffraction,scanning electron microscope,Talysurf FormS4C-3D Profiler,HX1000 micro-hardness indenter,MS-T3000 ball-on-disc tester and CS300 electrochemistry system were used to characterize the microstructure and properties of the coatings.The results showed that the crystal structure of coatings changed from substoichiometric Cr2N (201) to fcc CrN (220) preferential orientations with increasing deposition pressure and better surface morphologies were obtained when nitrogen pressure was in between 2 Pa to 5 Pa.The coating exhibited a maximum deposition rate of 10.2 μm/h and the lowest wear rate of 3.3× 10-6 mm3/N·m at 5 Pa.However,the best corrosion resistance was observed wh(e)n nitrogen partial pressure increased up to 8 Pa.