Abstract
Electron reemission Mossbauer (ERM) studies using the Sn119 Mossbauer isotope have been made on a series of tinplate samples with tin coatings ranging from 0.1 to 1.0 lb/bb (2.24 to 22.4 g/m2). With a recently developed theory of ERM spectroscopy, the ERM spectra could be analyzed to determine the thickness of the oxide , metallic Sn, and alloy layers on the tinplate samples. The resulting thicknesses were found to be in good agreement with the nominal coating weights and, for several samples, with the metal and alloy thicknesses determined by standard stripping techniques. The ERM method is shown to be very sensitive to thin tin oxide layers ranging from a few monolayers to several hundred angstroms thick.
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