On Tests of Consumption of Graphite Anode in the Electrolysis of Aqueous Solution-Part II.

Homogeneity and Electrolytic Consumption of Graphite Anodes

Abstract

With the intention of contributing to the improvement of the testing method of consumption of graphite anode, measurements were made of electric resistance and electrolytic wear of graphite pieces cut from sample anodes. Nine samples of commercial anodes were cut into pieces 5mm×10mm×100mm, the lengthwise edge being parallel to the direction of extrusion of anode and pieces 5mm×10mm×lmm, the l edge being the extent of thickness of anode and perpendicular to the direction of extrusion. Electric resistance of all parts of these pieces was measured by D. C voltage drop method, and charts of resistance distribution on the sectional area perpendicular to the direction of extrusion of anode were made.
The above pieces which were cut perpendicular to the direction of extrusion, the length spanning the thickness of sample anodes, were used as anodes in the electrolysis of 4 N NaOH. These anodes stood endwise against steel cathods. The wear in the direction of the thickness of sample anodes was estimated from the lengthwise wear of the specimens. No direct relationship was found between the wear and the homogeneity represented by the, resistance distribution of tested anodes.