Corrosion Study on AZ80/91 Mg-Alloys Processed at Different Temperatures during the ECAE Process

Magnesium (Mg) alloys have emerged as promising materials for lightweight vehicle structural applications due to their high strength-to-weight ratio, contributing to enhanced fuel efficiency and reduced emissions. However, their susceptibility to corrosion has been a significant obstacle to their widespread adoption. This study investigates the corrosion behavior of AZ80/91 Mg alloys processed through Equal Channel Angular Extrusion (ECAE) at varying temperatures. ECAE is a powerful deformation technique that refines the microstructure and enhances the mechanical properties of materials. The influence of processing temperature on corrosion resistance in these alloys has been relatively unexplored, making it a critical area of investigation. As a concluding remark, the electrochemical corrosion of AZ80/91 Mg alloys showed better corrosion resistance after ECAP at a higher processing temperature of 663K compared to a lower processing temperature of 533K, this revealed a 71% and 90% improved corrosion resistance for AZ80 and AZ91 Mg alloy respectively.