プロペラ電気防食の海洋生物付着に及ぼす影響

抄録

In general, the copper suboxide is contained in anti-fouling paint for the ship. It prevents from growing the marine lives on the shell plating in the water because that the ionization of copper suboxide comes out from the surface of painting plates.
An anti-corrosion method that zinc or aluminium plates is fixed to the propeller surface is applied for the marine copper alloy propeller. Marine lives, in this case, seem to be able to grow easily on the surface because that the ionization of copper from the surface is suppressed. But there has been no report about the marine fouling. On the other hand, there are reports that an excessive anti-corrosion current keeps out the marine lives on the surface.
From these reports, effect of these anti-corrosion methods to the marine growth has not been declared.
Therefore, it is investigated, the growth rate of marine lives on two conditions of propeller material, namely the condition that zinc or aluminium was fixed and material itself, in the sea water in Oshima for about one and a half year. The test results in the difference which the formers were covered with marine foulings very much and the laters negligible.