導電塗膜による海洋生物付着防止技術 : 電流・電位分布に関する実験による検討(その1)

概要

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When marine growth adheres to the surface of ship's hull, fuel consumption increases, and conventionally antifouling paints consisting of organic tin compounds have been used for preventing adhering. However, organic tin compounds dissolving from these are known to contaminate the environment and tributyl tin compounds were designated as toxic substances in September, 1990; a substitute antifouling system is required. Mitsubishi Heavy Industries, Ltd. (MHI) has developed the new antifouling method by sea water electrolysis. In this system, the ClO^- ions effective for antifouling is generated by the sea water electrolysis reaction taking place by electric current supplied from the electro-conductive coatings on the surface of the structure. In order to design the antifouling system, therefore, the current density on the surface of electro-conductive coatings should be able to estimated. In this paper, a numerical method is developed for the analysis of the current density on the surface of electro-conductive coatings. The validity and usefulness of the proposed method are confirmed by comparing with experimental results and by the numerical simulations of some antifouling models.
1996-09-04