| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric corrosion/lightning damage prevention method of a buried metallic pipe, which is buried in the ground and on the outside surface of which an insulating coating layer is formed, in which method the electric corrosion or lightning damage of the buried pipe due to a ground potential rise caused by lightning or a stray current can be prevented rationally and suitably.SOLUTION: The electric corrosion/lightning damage prevention method of the buried pipe comprises the steps of: selecting the buried pipe, at least a part of which is laid in a ground potential rise/change area A1, where the ground potential rise is caused and a change rate thereof is recognized in such a current inflow state that a current flows into the ground 10 from a current generation source X disconnected electrically from the buried pipe 20, as the buried pipe 21 which is to be treated and is corrosion-proofed; and grounding a predetermined specific spot 23, the pipe ground potential of which in the current inflow state is nobler than a natural potential or a corrosion-proof control potential, of the buried pipe 21 to be treated through a metallic grounded material 30 buried in the ground 10. |
