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Relative Importance of Various Sources of Defect‐Producing Hydrogen Introduced into Steel During the Application of Porcelain Enamels
Author(s) -
MOORE DWIGHT G.,
MASON MARY A.,
HARRISON WILLIAM N.
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.tb13062.x
Subject(s) - frit , hydrogen , pickling , deuterium , materials science , quenching (fluorescence) , metallurgy , coating , chemistry , composite material , fluorescence , physics , organic chemistry , quantum mechanics
Deuterium (heavy hydrogen) was used to trace the source of defect‐producing hydrogen in steel. The deuterium was introduced, in turn, as a replacement for protium (regular hydrogen) in the pickling acid, the milling water, the quenching water, the chemically combined water in the clay, and the dissolved water in the frit. The gases evolved during fishscaling of the coated steel specimens from each experiment were collected and analyzed for deuterium and protium with the mass spectrometer. The data showed that the principal source of defect‐producing hydrogen was the dissolved water in the frit. Experiments in which the presence or absence of lifting and fishscaling served as criteria confirmed the tracer work. Other experiments demonstrated that reboil in ground‐coat enamels is closely associated with the water content of the coating.