Cerium molybdate nanowires for active corrosion protection of aluminium alloys

In this paper the inhibitive performance of cerium molybdate nanowires prepared by a novel methodology is reported. The methodology is based on a low-temperature, controlled-rate mixing process. Structurally, cerium molybdate nanowires were found to be amorphous-like materials whose inhibiting action towards aluminium alloy 2024-T3 was demonstrated by DC polarization and electrochemical impedance spectroscopy (EIS), corroborated by microstructural surface analysis of the metallic substrate. The observed inhibiting action is attributed to the higher solubility of the cerium molybdate nanomaterials with respect to crystalline sodium cerium molybdate obtained at room temperature.

► New methodology for synthesis of cerium molybdate nanowires is reported. ► Solutions with cerium molybdate nanowires provide inhibition to aluminium alloy 2024-T3. ► Inhibition associated with the formation of a thin dense barrier layer consisting of molybdenum oxides/hydroxides.