A series of oxide films of Ni-Cr-Mo alloys (corrosion resistant alloys in both oxidizing and reducing environments) where analysed by XPS. Survey scans (how to quantify here) and high resolution scans of the Ni 2p, Cr 2p, Mo 3d, O 1s and C 1s peaks were taken and the various chemical states determined and quantified using the curve-fitting procedures from [2-4] and .
|Figure 1. XPS survey spectrum recorded on C22 after polarization at 0 V (+) in a pH = 7 solution.|
|Figure 3. High-resolution deconvoluted XPS spectra for (a) O 1s, (b) Ni 2p, (c) Cr 2p and (d) Mo 3d collected on C22 at 0 V (+) and pH = 7.|
|Figure 4. Normalized relative film composition (%) of Ni, Cr and Mo and their relative metal, oxide, hydroxide components present in films polarized at specific potentials for (a) C22 and (b) BC1 alloy.|
Caveat: Depth effects have not been accounted for here. Further work using Auger and/or XPS depth profiling, angle resolved analysis or QUASES analysis can help to further clarify the positions of various species. It is of course assumed here that the metal detected is from the underlying alloy.
 Ebrahimi, Nafiseh, "The Influence of Alloying Elements on The Crevice Corrosion Behaviour of Ni-Cr-Mo Alloys" (2015). Electronic Thesis and Dissertation Repository. 3316. http://ir.lib.uwo.ca/etd/3316
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