Fig. 3: Oxidation-resistance capability of Zn metal and eutectic Zn/Al alloys.

a Electrochemical impedance spectra (EIS) of eutectic Zn88Al12 alloys with various lamellar spacings (λ = ∼450, ∼1050 and ∼1850 nm), hypoeutectic Zn50Al50 alloy and monometallic Zn after immersed in the O2-present ZnSO4 aqueous electrolytes for 1 h. b Evolutions of the charge transfer resistances (RCT) of eutectic Zn88Al12 alloys with various lamellar spacings (λ = ∼450, ∼1050 and ∼1850 nm), hypoeutectic Zn50Al50 alloy and monometallic Zn when extending the immersing time from 1 to 10 h in the O2-present ZnSO4 aqueous electrolytes. c, d EIS spectra of eutectic Zn88Al12 alloys with various lamellar spacings (λ = ∼450, ∼1050 and ∼1850 nm), hypoeutectic Zn50Al50 alloy and monometallic Zn (c) and their corresponding RCT values (d) in the O2-absent ZnSO4 aqueous electrolyte for 1 h.