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
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.