Abstract: The invention relates to a cathodic protection system for above-ground storage tanks having metal bottoms, either new or retrofitted bottoms. A leak containing dielectric safety membrane is spaced a short distance below and extends beneath the tank bottom generally parallel thereto forming a narrow envelope. Compacted electrolytic conductor material is positioned between the membrane and the tank bottom supporting the tank bottom embedding a horizontally disposed cathodic protection anode, the anode being in the form of a matrix, maze or grid of interconnected titanium wires, or wires and ribbons or bars. A reticulate or open dielectric insulator may be embedded in the electrolytic conductor and positioned directly above the anode and such insulator is operable to keep any portion of the anode from contacting the tank bottom and to maintain a generally uniform spacing between the anode and tank bottom.

Abstract: The invention relates to a cathodic protection system for an above-ground storage tank having a metal bottom, both new and retrofitted bottoms. A leak containing dielectric safety membrane is spaced a short distance below and extends beneath the tank bottom generally parallel thereto forming a narrow envelope. Compacted electrolytic conductor is positioned between the membrane and the tank bottom supporting the tank bottom embedding a horizontally disposed cathodic protection anode, the anode being in the form of a matrix or grid of interconnected titanium bars and ribbons. A reticulate dielectric insulator may be embedded in the electrolytic conductor and positioned directly above the anode and such insulator is operable to keep any portion of the anode from contacting the tank bottom and to maintain a generally uniform spacing between the anode and tank bottom. The ribbons extend transversely of the bars and are spot welded on uniform centers to bars on diameters or major chords of a circular tank bottom.

Abstract: A cathodic protection system and method for steel reinforcement in concrete structures such as bridge decks, parking garage decks and highways utilizes platinized niobium or like metal wire anodes strategically positioned adjacent the concrete in a matrix of conductive carbonaceous material. The anode and matrix are preferably positioned in slots saw cut in the concrete surface avoiding the disposition of a conductive and wear resistant surface overlay which is not only expensive but which may exceed the design limitations of the structure. An impressed protective cathodic protection current is provided between the anodes and the steel of the structure. At places where the anode crosses in close proximity to reinforcing steel which may be exposed by the slot, or at places where cathodic protection current is not desired, a plastic sleeve may be placed over the anode.

Abstract: An electrical connection for all of the exposed concentric neutrals of underground direct burial power cables made from a kit including a soft, completely tin-coated, L-shaped copper sleeve wrapped about the cable, the short leg of the L forming a projecting tab. A ring-tong crimp type connector is bolted to the tab and the entire bolted connection and crimp connector is dip soldered. After the sleeve is wrapped about the cable, it is surrounded by a rubber gasket field cut to fit. A hose clamp having a special metal shim constricts the sleeve causing good electrical contact with all of the exposed concentric neutrals and secures the sleeve in place. A lead wire is then crimped in place in the crimp type connector.