| 摘要 |
A shielded anode, preferably of the aluminum type, comprising an elongated anode body encased on all sides including the top, bottom and the ends by a sheathing which comprises a pair of plastic casings including an inner casing which is in direct contact with the anode body, at least at the corners thereof, and an outer casing surrounding said inner casing and in contact therewith at least at the corners thereof. The outer casing is further supported by spacer members located between the outer surface of the inner casing and the inner surface of the outer casing. The inner casing includes a plurality of spaced elongated openings on all the sides and the outer casing includes a plurality of small openings offset with respect to the inner casing openings for permitting good, essentially free contact between the anode and the sea water electrolyte, which is also the primary corrodent, while preventing direct contact between other metals or spark-producing surfaces and said anode body in the event of accidental dropping of the anode or impact from another object falling onto the anode assembly. The ends of both casings are flattened such that opposing sides are contiguously disposed and sealed together by appropriate heat sealing of rivets or molded end caps. A metal elongated support rod extending through the anode body extends outwardly at either end thereof through the flattened sealed casing end portions for providing means to support the anode within the hull of the tanker on the various support structures and to provide a metallic electrical connection between the anode and the ship structure.
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