| 摘要 |
A shielded anode for use in controlling corrosion, for example, in a truck or a tanker, comprising a perforated plastic shield encompassing the anode and having a hinged flap on opposite sides thereof supporting at its free end a float member, such that the flap will lift from closed or down position to a raised position due to buoyancy of the float member during immersion of the anode. When the tank in which the shielded anode is located is empty, the flaps will close, thus protecting the anode due to hazards which may result from falling or contact with other metal bodies. The aforesaid hinge may take the form of a living hinge, i.e. integrally with the shield, and in conjunction with the integral float member will permit the anode to function normally to prevent or at least minimize corrosion while still providing the desired protection against sparks caused by falls or other accidents. Another embodiment may comprise a single shield continuously disposed about the anode and sealed at opposite ends such as by end cover, of sufficient thickness to withstand impact and having spaced anode vent holes.
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