電気防食した鋼材面の水深別付着生物の着生について

抄録

The amount of marine organisms attached to maid steel plate cathodically protected by alu-minum alloy anode, its control steel plate, and FRP (fiber reinforced plastic) plate which were immersed in 1-25m water depth, the largest attaching was found on cathodic protection plate, with the next Largest being slightly less on FRP plate and the least on the control plate On each of the three plates mentioned above, the largest amount of attaching was found ai the 3-7m depth and below the 10m depth it increased.
With the cathadic protection rate, there were no noticeable changes in varied water depths. However, the corrosion rate was lower at depth of 3-7m with a higher occurence of attaching organisms, while the corrosion rate was higher at depth of 25 m. Also on the cathodic protection plate the potentials varied toward less noble, and the protective current density became lower as the amount of marine organisms increasced. Simultaneously, less noble potentials and lower current densities were observed. At 1-7m depth, where more organisms were attached than in 10-25m depth, less noble potentials in low current densities were observed.