| 摘要 |
There is proposed a marine cathodic protection system (29) configured to protect a metal structure (15, 17) exposed to seawater from corrosion. The system (29) comprises a first anode (30) provided on or adjacent the protected metal structure (17) at a first position (31). The first anode (30) is exposed to seawater, is electrically insulated from the protected metal structure (15,17), and is formed of a metal having a greater negative potential than the protected metal. The system (29) further comprises a second anode (33) provided on or adjacent the protected metal structure (15) at a second position (34). The second anode (33) is electrically connected to the first anode (30). Said first position (31) is preferably substantially submerged in said seawater such that the protected metal (17) and the first anode (30) cooperate to define a seawater battery configured to apply an electrical current to the second anode (33), the second anode (33) thus being an impressed current anode. |
