(a) Schematic diagram for constructing the ZnO + organic acid hybrid inhibitors system; corrosion inhibition mechanism for (b) ZnO inhibitor and (c) ZnO + organic acid hybrid inhibitors. (d and e) Discharge performance of Al-air battery based on Al foam anode in NaOH electrolyte (4 M) with different inhibitors: (d) single inhibitor, (e) ZnO + organic acid hybrid inhibitors. Adapt with permission from Ref. [57]. Copyright 2019 Elsevier B.V.