| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric corrosion protection device for a coated metallic body in an atmospheric environment, in which the degradation of a coating film due to the generation of gaseous chlorine from an electrode of the electric corrosion protection device is hardly caused, a corrosion protective current is made to reach over the broad range of a coated structure by the ion conduction of a moisture adhered to a hydrophilic layer, and further, drying around the electrode is prevented by a water retentive layer around the electrode and the corrosion protection of the coated steel structure in the atmospheric environment is achieved over a long period. SOLUTION: A durable electrode 2, in which the generation of oxygen is dominant in the case of electrolyzing an electrolytic soln. contg. chloride ions, is mounted arbitrary area of the surface of the coated metallic body 1 in the atmospheric environment by being electrically isolated from the metallic body 1. An arbitrary range of a surface of the coated metallic body 1 around the durable electrode 2 is covered with the hydrophilic layer 5. Simultaneously the water retentive layer 4 in contact with the hydrophilic layer 5 is mounted around the durable electrode 2. The durable electrode 2 is connected to a positive electrode of a DC power unit 8 and the coated metallic body 1 is connected to a negative electrode of the DC power unit 8. |
