fig2

Figure 2. Optical image of initial state of (A) Bare-Zn and (B) Ni@Zn and (C) Ni-0.1W@Zn compared with after soaked and immersed in 2M ZnSO₄ electrolyte for 14 days. SEM images of (D) Bare-Zn, (E) Ni@Zn and (F) Ni-0.1W@Zn immersed in 2M ZnSO₄ electrolyte for 14 days of surface. Contact angles of (G) Bare-Zn, (H) Ni@Zn and (I) Ni-0.1W@Zn and (J) Tafel curve of Bare-Zn, Ni@Zn and Ni-0.1W@Zn.