Research Article

XPS Depth Study on the Liquid Oxidation of Sn-Bi-Zn-X(Al/P) Alloy and the Effect of Al/P on the Film

Figure 2

XPS depth profiles (at.%) for (a) oxygen, (b) zinc, (c) tin, (d) bismuth, and (e) aluminium and phosphorus recorded for the SBZ, SBZA, and SBZP specimens.
(a)
(b)
(c)
(d)
(e)