Kovar (Fe-29 Ni-17 Co wt%) is widely used in electrical components. For applications such as feed-throughs there is a requirement to join it to glass, forming a glass-to-metal seal. A controlled thickness, well adhered, oxide is desired on the Kovar to form a strong bond. The oxides formed on Kovar pre-oxidized, at 700 and 800 °C for ten min, have been analyzed. Each sample showed the presence of Fe2O3, CoO and NiO. XPS survey spectra and high resolution spectra were collected and are presented.
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