Development of metal oxide incorporated Al-Zn-Sn sacrificial anodes processed by stir casting and heat treatment

Abstract Aluminum sacrificial anodes are currently the first choice for cathodic protection in numerous applications. The galvanic performance of aluminum-based is considerably enhanced by addition certain alloying elements called activators. Recent researches proved that incorporation specific metal oxides like MnO 2 , CeO RuO and IrO into aluminum matrix could enhance efficiency anodes; however, mechanism which improve properties still subject to discussion. present work investigates effect incorporating commercially available low-cost manganese dioxide concentrate Al-5Zn-0.1Sn different volume fractions. It also studies influence heat treatment on anode’s performing solution at 3 temperatures (250 °C, 400 550 °C). electrochemical testing results an increase incorporated with treated °C. SEM imaging EDX elemental mapping declared presence SiO particles anode might cause effective uniform corrosion Al decreased non-coulombic losses. Graphical abstract