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Migration of Cobalt During Firing of Ground-coat Enamels on Iron
To determine experimentally what happens to the cobalt oxide in a porcelin-enamel ground coat during firing, a porcelin 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 porcelin enamel and underfired and overfired enamels. The enamel, metal, and interface layer between the enamel were then removed separately, by chemical solution, and radioassays wer made on the solutions and residues.
NASA Memorandum
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