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. 2018 Jul 19;8:10925. doi: 10.1038/s41598-018-29299-5

Figure 2.

Figure 2

Surface morphology of AZ31 magnesium coated by (a) plasma electrolytic oxidation (PEO) at a current density of 100 mA/cm2 for 5 min and (b) PEO process followed by dip-coating in thiourea solution for 20 h at ambient temperature, and the elemental color maps of Mg, Al, C, and O.