ANTICORROSIVE TECHNOLOGY ON THE INNER SURFACE OF PETROLEUM SEWER PIPELINE

摘要

Pipeline corrosion is mainly caused by the surrounding factors outside the pipeline and the corrosive mediums transmitted in the pipeline.- Above all, the most serious corrosion is resulted from petroleum sewage in the pipeline.rnIn this paper, a new anticorrosive technology on the inner surface of petroleum will be introduced. The technology includes: ⅰ) to paint the epoxy powder inner coating on steel pipe with fric-tional electrostatic painting technology; ⅱ) to paint the nickel-base alloy powder coating on the welding joint inner surface of heat effected zone with plasma painting technology; and ⅲ) to take stainless steel welding rods as the welding base on the welding joint of steel pipe with Tungsten argon arc welding technology.rnConsequently, a continuous and closed coating, which can protect and anticorrode the inner surface of steel pipe, is made up of epoxy powder coating, alloy powder coating and stainless steel welding seam.