| 摘要 |
PURPOSE:To provide an electrolytic corrosion protector constituted in such a way as to suppress the electrochemical corrosion of the whole corrosion protected body including a rudder plate effectively by dissolving potential difference between the rudder plate and a hull. CONSTITUTION:In addition to a first positive electrode 34, a first d.c. power unit 32, a reference electrode 35 and a control circuit 33 existing to prevent the electrolytic corrosion of the whole corrosion protected body 20 of a marine vessel, a second positive electrode 40 electrically insulated from a rudder plate 24a is provided at least at the front side end part of the rudder plate 24a. An electrolytic corrosion protector thus constituted is further provided with a potential difference detecting circuit 52 for detecting potential difference between the rudder plate 24a and a hull 21, and a variable output second d. c. power unit 54 for relatively imparting positive potential to a second positive electrode 40 and negative potential to the rudder plate 24a so that the potential difference approaches to zero in response to a signal from the potential difference detecting unit 52. |
