Abstract: Steel claded with plastic has a excellent corrosion resistance to acid, base and organic solvant. The features of plastic clads are analyzed, and the corrosion resistance, applicable temperature of polyethylene, polyvinylidene fluoride, polyphenylene sulfide, polyurethene and epoxy resin, in addition, some application examples of plastic-claded steel abroad are introduced. For the internal pipe wall claded with electrostatic spray-on process, the various anti-corrosion indexes have reaches the design requirements, the impact strength is not less than 4.9 J; the breakdown valtage of the clad is not less than 30 kV/mm. The clad thickness of electrostatic spray-on is usually 70~80 μm, the ambient temperature while spraying is properly controlled at 20~30 ℃.