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. 2020 Feb 24;10:3247. doi: 10.1038/s41598-020-60070-x

Figure 4.

Figure 4

(ac) The SEM analysis of the cross-section of the uncoated NiTi alloy, GO-coated NiTi alloy, and GO/Ag-coated NiTi alloy. A layer of GO-coatings (~1.13 µm) and GO/Ag-coatings (~1.35 µm) were evident on the surface of GO-coated NiTi alloy, and GO/Ag-coated NiTi alloy, respectively. Thickness of the coatings were analyzed from the surface profilometer. (df) The surface morphology of the bare NiTi GO-coated NiTi, and GO/Ag-coated NiTi alloys following the potentiodynamic polarization experiments. The arrows indicate the pitting corrosion.