X-Ray Photoelectron Spectroscopy Study of Passive Layers Formed on Pb-Sn and Pb-Sb Alloys
نویسندگان
چکیده
In this article, passivated Pb-Sn and Pb-Sb alloys with different compositions were studied by X-ray photoelectron spectroscopy (XPS). The passive films were found to have a double-layer structure. Both Sn and Sb were found to play an important role during the growth of passive film, which resulted in different compositions of passive filJ;l1s. The Pb oxides, Pb sulfate, SnlSb oxides, and Pb-SnlSb complex oxides(PbOx ·Snl-x02, PbSb20 6) were present in the passive films. Both Sn and Sb facilitated PbOx (1 < x < 2) formation, which was considered to be very helpful to optimize the conductivity of passive films. It was also shown that the positions of peak signals of alloying Sn/Sb, Pb, and ° were almost fixed, even though the contents of alloying Sn/Sb oxides were quite different in different specimens. .
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