TiA1N coatings were deposited on the surface of zirconium alloys by multi-arc ion plating with different arc currents. The effect of arc current on surface morphology, elemental composition, high temperature oxidation resistance, adhesion strength and phase structures of TiAlN coatings was analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), high temperature heat treatment furnace, scratch tester and X-ray diffractometer( XRD), respectively. Results showed that the quantity of large particles on TiA1N coat...