COLUMBIC COPPER IS A NEW CLASS OF NANO-STRUCTURED ELECTROTECHNICAL ALLOYS BASED ON COPPER AND NIOBIUM. IT IS CHARACTERIZED BY A UNIQUE COMBINATION OF HIGH STRENGTH AND HIGH CONDUCTIVITY.NIOBIUM IS AN EXTREMELY REFRACTORY METAL, RESISTANT TO MANY AGGRESSIVE ENVIRONMENTS. IT IS NOT SUSCEPTIBLE TO THE INFLUENCE OF ANY ACIDS, EXCEPT FOR HYDROFLUORIC ACID