Effect of Crystal Orientation on the Corrosion Behavior of As-Cast Pure Aluminum Anodes in Air Batteries

In this study, the effect of crystal orientation on the corrosion behavior of an as-cast pure aluminum anode (PAA) in alkaline solution was systematically investigated based on electrochemical measurements and quasi-in situ observations. The results show that PAA with different crystal orientations exhibits disparate electrochemical activities and corrosion behavior, which is attributed to the potential differences for each crystalline orientation. The (001) lattice plane with a lower surface energy and more homogeneous potential distribution shows a better corrosion resistance than other lattice planes. This work could provide a way to improve the corrosion performance of aluminum air batteries in alkaline electrolytes by controlling the crystal orientation of PAA.

Automated summary

This study systematically investigated the effect of crystal orientation on the corrosion behavior of an as-cast pure aluminum anode in alkaline solution. The results indicate that different crystal orientations of the anode exhibit varying electrochemical activities and corrosion behavior, with the (001) lattice plane showing the best corrosion resistance. This research provides a way to enhance the corrosion performance of aluminum air batteries in alkaline electrolytes by controlling the crystal orientation of the anode.