a cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy which can beneficially be used in cable constructions designed for the transmission of electric power or communications . the cable shielding tape may be formed as a strip having one or both sides coated with or laminated to an adhesive thermoplastic resinous polymer . the tape is disposed within a cable at the desired location to provide good mechanical and electrical properties therein . in addition to providing good mechanical and electrical properties for a cable , the aluminum / aluminum alloy shielding tape substantially reduces the problem of bi - metallic galvanic corrosion caused as a result of interfacing metals having widely differing electrolytic potentials .