| 摘要 |
The present invention relates to an electrical conductor, in particular suitable for use as an insoluble anode in electrowinning processes, and in electrochemical processes in general, characterized in that it is constituted by a bimetallic wire composed by an inner core of copper coated with an outer, thinner layer of a transition metal, preferably selected from among tantalum, titanium and niobium. The invention is also concerned with a process for manufacturing an electrical conductor, characterized in that it comprises the steps of: (a) inserting a copper bar inside a tube made from said transition metal, with the thickness of the wall of said tube being substantially smaller than the diameter of said copper bar; (b) inserting said transition metal tube containing said copper bar inside a copper tube; (c) submitting the three-metal structure obtained from the (b) step to drawing, with the diameter thereof being reduced until a corresponding three-metal wire is obtained, which has a predetermined diameter, and is composed by an inner copper core coated by a thinner layer of said transition metal, which layer is in its turn clad by an outer copper layer; (d) removing said outer copper layer by means of suitable means, e.g., by dipping in a suitable copper solvent, which is chemically inert towards said transition metal, in such a way said bimetallic wire, composed by an inner copper core coated by an outer, thinner layer of said transition metal being obtained. |
