Premium
Surface composition of machined leaded brass
Author(s) -
Wu J. X.,
Ji M. R.,
Galeotti M.,
Giusti A. M.,
Rovida G.
Publication year - 1994
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740220170
Subject(s) - brass , metallurgy , metal , layer (electronics) , surface layer , materials science , zinc , oxide , copper , base metal , composite material , welding
ESCA and RBS were used to obtain quantitative information on the thickness and nature of the surface layers formed on machined brasses containing 1–3% lead. The results show that the brass surface is strongly enriched in lead. The amount of this element accumulated on the surface increases with increasing bulk concentration. Lead appears to be present as islands partially covering the brass surface and having variable thicknesses up to several hundred Å. The outermost layer of the islands is mainly a Pb hydroxycarbonate, under which PbO and Pb metal can be detected. Between the islands, the brass surface is covered by a layer of zinc oxide covering the CuZn metallic phase. The accumulation of Pb at the surface is attributable to a smearing effect caused by the machining cool.