| 摘要 |
Apparatus for cathodically protecting a metal structure 3, 11 from corrosion comprises (a) a material (e.g. sponge) 1, 12 for retaining an electrolyte in contact with the structure, (b) a permeable cover 2, 13 over the material, (c) an anode 5 in contact with the material but not in direct electrical contact with the structure and means 4 for applying a voltage between the anode and the structure in the case of the impressed current system, and (d) an anode 15 welded to the structure in the case of the sacrificial anode system. The invention may be used to protect the splash or tidal area of any marine structure or vessel since the sea water serving as electrolyte for cathodic protection is retained in contact with the structure. <IMAGE> |
