anode and control the electrodes and controls were suspended above the thermally stabilized molten electrolyte then lowered 0 3 cm into the electrolyte while monitoring the resistance for most tests the current densities based upon the original immersed surface area were estimated to be between 0 6 and 1 6 a cm 2 reagent grade k 2 co 3 and k 2 so 4 were used as pure potassium salt melts a synthetic slag having a composition as given in table i was prepared from metallic oxides and carbonates the slag was melted in platinum or al 2 o 3 crucibles and held at 1773 u00b0 k for at least 7 hours to ensure compositional homogeneity table i______________________________________ montana rosebudmaterial mole ______________________________________sio sub 2 54 75al sub 2 o sub 3 14 28cao 17 91fe sub 2 o sub 3 3 37mgo 7 86tio sub 2 0 69k sub 2 o 0 51na sub 2 o 0 44p sub 2 o sub 5 0 19______________________________________ the results of the studies comparing the electromechanical properties of the electrode materials are given in table ii below table ii__________________________________________________________________________ experimental conditions corrosion ratesexperiment moles coulombs wt loss no electrolyte k sub 2 o fe sub 2 o sub 3 temp time total 10 sup 6 g cm sup 2 hrmole mole mole mole u00b0 k min coulombs cathode anode cathode anode control__________________________________________________________________________25 fe sub 3 o sub 4 75 mgal sub 2 o sub 4 28 k sub 2 so sub 4 1423.