Effect of Torsional Stress on the Electrode Potential of Copper

The emf of a galvanic cell which consisted of a stressed metal electrode and an unstressed metal electrode was measured. The experimental data showed that for low torsional stresses there was a parabolic relationship between the emf and the torsional stress. It was observed that the stressed electrode was more anodic with respect to the unstressed reference electrode in agreement with the majority of the previous investigations. Experimental data of emf and torsional stresses for B & S gauge 12, 14, and 16 hard-drawn copper wires are presented.