Fig. 6: Reference XPS spectra obtained on oxide-free surfaces of pure metallic substrates.
From: Origin of enhanced passivity of Cr–Fe–Co–Ni–Mo multi-principal element alloy surfaces
a Cr 2p, b Fe 2p, c Co 2p, d Ni 2p, e Mo 3d core levels and f Co L2M23M45 and g Ni L3M23M45 Auger transitions.
