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A Radioisotope Study of Cobalt in Porcelain Enamel
Author(s) -
HARRISON WILLIAM N.,
RICHMOND JOSEPH C.,
PITTS JOSEPH W.,
BENNER STANLEY G.
Publication year - 1952
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1952.tb13082.x
Subject(s) - cobalt , enamel paint , materials science , metal , metallurgy , oxide , layer (electronics) , cobalt oxide , composite material , mineralogy , chemistry
A typical porcelain enamel ground coat containing a small amount of radioactive cobalt as oxide was prepared, applied to sandblasted enameling iron blanks, and fired under conditions selected to give underfired, normally fired, and overfired coatings, respectively. Examination of these specimens revealed that a cobalt‐bearing metallic deposit had been formed at the enamel‐metal interface during firing, and that the enamel layer was depleted in cobalt oxide near the interface. The amounts of such deposit and depletion were found to vary directly with the severity of the firing treatment. The amount of metallic deposit was extremely small, on the order of 0.01 μ thick if computed as a continuous layer of metallic cobalt in the case of the normally fired specimens.