Abstract: A protective apparatus adapted for limiting corrosive effects of a liquid stored in a metallic storage tank. The apparatus includes anode means for carrying an impressed current to produce an electrolytic effect and inhibit corrosive interaction between the liquid and tank. Means for supplying electrical power is provided to the anode means and the anode means is supported from a side wall of the associated tank. Elastic members extend between the side wall and the anode means to maintain them in a submerged condition. Level compensator means includes a member having approximately neutral buoyancy so that it adds further weight to the apparatus as the liquid level decreases. Additionally, quick connect/disconnect means is provided to facilitate assembly and maintenance in existing and new storage tanks.

Abstract: A wire entrance fitting for eliminating leakage through a side wall of a tank has a tubular member which is externally threaded at opposed ends. Plural, threaded members are received in the tubular member and extend through an encapsulating, generally inert material. A first end of the threaded members receives an exposed wire from a cathodic protection system positioned in the tank for inhibiting corrosion, is crimped thereto, and sealingly encapsulated by a resinous material. A second end of the threaded members extends outwardly from the tank for connection to an external power supply. A flange is disposed along the tubular member and extends outwardly therefrom. The flange facilitates receipt of a junction box in one arrangement and positions an elastomeric seal member along an inner face of the tank side wall in a second arrangement.