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Figure 10. Scanning electron microscopic images for the uncoated and 4 and 6 mm Mg-Zn-Ca TFMG-coated Mg samples fabricated via magnetron sputtering process before and after polarization: (A) uncoated with (i) magnification by 600 × and (ii) magnification by 500 ×; (B) 4 mm coated with (i) magnification by 270 × and (ii) magnification by 290 ×; and (C) 6 mm coated with (i) magnification by 90 × and (ii) magnification by 50 × (D) Tafel plot of uncoated pure Mg and coated Mg with Mg-based TFMG. Reproduced with permission from reference^[201] © Taylor & Francis, All right reserved.