The process parameters on cutting force, surface roughness, surface profile and morphology, the corrosion and current density were studied. The results show that the milling force and surface roughness increase first then decrease and then increase with the increase of milling speed, and the milling force and surface roughness increase with the cutting depth increasing. The corrosion resistance of machined surface is improved by the extrusion strengthening of milling flank face. When the cutting speed is 4000r/min and the axial depth is 0.25mm, the corrosion resistance of the machining surface is the best. The micro-cracks are prone to produce under relatively larger cutting depth,so the corrosion of machined surface becomes more intense.