Fig. 1 The elements distribution for (a) Mg, (b) Al, (c) Ce and (d) O in the conversion coating obtained by EPMA.
Fig. 2 The elements distribution in the cross-section of theconversion coating on Mg alloy detected by EPMA.
Fig. 3 XPS spectra of the conversion coating, (a) full range surveyed spectra; (b) oxygen 1s spectra; (c) Ce Cerium 3d spectra.
Table 1 The elemental composition of conversion coatings treated under different process conditions (mass)%
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