Metal pipeline surface anticorrosive device

The invention discloses a metal pipeline surface anticorrosive device. The metal pipeline surface anticorrosive device is characterized that the metal pipeline surface anticorrosive device comprises an oscillating circuit (10), a coil (1) and a magnetic conductive ring; a metal pipeline (4) is sleeved with the magnetic conductive ring; the coil (1) is wound around the magnetic conductive ring, and moreover the coil (1) and the oscillating circuit (10) are connected to form a current loop; the magnetic conductive ring can be one or a mixture of ferrite, cobalt and nickel, and the included angle between the normal direction of the plane where the magnetic conductive ring is located and the axial direction of the metal pipeline (4) ranges from 0 to 60 degrees; the magnetic conductive ring is used for introducing an alternating electromagnetic field to the metal pipeline (4), and the surface of the metal pipeline (4) is anticorrosive. The metal pipeline surface anticorrosive device is stable in metal anticorrosive effect, impurities can not be introduced additionally, the energy transmission effect is good, safety is high, and practical application is facilitated.