CHARACTERIZATION OF THE CORROSION LAYER OF COPPER-NICKEL-ALLOYS IN A SYNTHETIC SWEAT MEDIUM BY FTMS AND LAMMA LASER MICROPROBES

Citation
S. Colin et al., CHARACTERIZATION OF THE CORROSION LAYER OF COPPER-NICKEL-ALLOYS IN A SYNTHETIC SWEAT MEDIUM BY FTMS AND LAMMA LASER MICROPROBES, Applied surface science, 125(1), 1998, pp. 29-45
Citations number
16
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
Journal title
ISSN journal
01694332
Volume
125
Issue
1
Year of publication
1998
Pages
29 - 45
Database
ISI
SICI code
0169-4332(1998)125:1<29:COTCLO>2.0.ZU;2-S
Abstract
This study conducted with FTMS and LAMMA laser microprobes has made it possible to characterize the corrosion layer formed on the surface of copper-nickel alloys. This was done after 6 weeks of immersion in syn thetic sweat. The experimental results show that the corrosion layer i s essentially composed of copper-based species, the nature of which is determined by the alloy composition. We show the formation of copper trihydroxy-chloride for alloys with a high copper content as well as c opper (I) oxide doped with chloride anions for alloys with a high nick el content. We also highlighted the selective corrosion of nickel. Thi s characterization of the corrosion layer as well as the selectivity o f the corrosion process permit us to explain the evolution of the quan tity of nickel released, which is necessary in turn to estimate the al lergenic power of these alloys during their immersion in synthetic swe at. (C) 1998 Elsevier Science B.V.