Intro: arc spraying is through a dedicated power supply, so that the charged corrosion resistant metal wire arc melting 1/1000-1/10000 seconds, the high temperature molten metal droplets are compressed air blowing, atomizing, spraying to pre-sand-blasting the surface of the steel structures, the formation of high purity, the combination of strong mechanical - metallurgy combination spray coating, its lively steel substrate with cathodic protection. Then uniformly coated on the sprayed layer having a corrosion inhibiting effect of special sealing agent, it not only can be further isolated from the corrosive media erosion matrix steel, while the metal layer and the closure of the arc spraying coating interface impedance increases, the corrosion resistance can be greatly enhanced . Arc spraying anti-corrosion coating corrosion protection principle of the combined effects of mechanical shielding and cathodic protection. When the coating is damaged, the presence of corrosive media, metal spray coating can sacrifice themselves to protect the steel substrate corrosion;