MIGRATION OF COBALT DURING FIRING OF GROUND-COAT ENAMELS ON IRON

摘要

To determine experimentally what happens to the cobalt oxide in a porcelain-enamel ground coat during firing, a porcelain enamel containing a radioactive isotope of cobalt (Co60) smelted into the frit was prepared and applied to enameling-iron blanks. These specimens were fired under conditions which produced a normal porcelain enamel and underfeed and overtired enamels. The enamel, metal, and interface layer between the-enamel and metal were then removed separately, by chemical solution, and radioassays were made on the solutions and residues.