Friction stir processing (FSP) is applied in the treatment of low cost commercial purity Al (CP-Al) containing iron impurity element with the aim of optimizing the electrochemical properties and discharge performance of CP-Al as the anode of Al-air battery. FSP induced severe plastic deformation effects not only significantly refines CP-Al grains which have an average size of 3 μm but also leads to the fragmentation and the reduction in the amount of Al-Fe phase. Due to the above reasons induced by FSP, the corrosion resistance of CP-Al is increased, which is proved by hydrogen evolution rate test, potentiodynamic polarization measurement and EIS test; on the other hand, more negative corrosion potential values of CP-Al are obtained, indicating both the electrochemical activity and corrosion resistance of CP-Al are enhanced simultaneously. FSP make the discharge performance of CP-Al anode more stable and the average values of discharge potential, energy density as well as utilization of CP-Al anode are significantly increase from 1.054V/1251 mWh g⁻¹/39.8% to 1.116V/1674 mWh g⁻¹/50.3% at 20 mA∙cm⁻². Meanwhile, the power densities of two batteries with C-Al and FSP-Al anodes are 44.38 and 47.17 mW cm⁻² at 50 mA cm⁻², and the difference of which reached a maximum of 2.79 mW cm⁻². The improvements in electrical properties and discharge performance of CP-Al anode can be attributed to the microstructural refinement and the decrease in self-corrosion of CP-Al induced by FSP.

摩擦搅拌工艺（FSP）用于处理含铁杂质元素的低成本商业纯铝（CP-Al），目的是优化CP-Al作为铝空气电池的负极的电化学性能和放电性能。FSP引起的严重塑性变形效应不仅显着细化了平均尺寸为3μm的CP-Al晶粒，而且还导致碎裂和Al-Fe相含量减少。由于FSP引起的上述原因，CP-Al的耐蚀性得到了提高，这通过氢析出速率试验，电势极化测量和EIS试验得到证明。另一方面，获得了更负的CP-Al腐蚀电位值，表明CP-Al的电化学活性和耐蚀性同时提高。^-1 /39.8%到1.116V / 1674 mWh的克^-1 /50.3%在20mA∙厘米^-2。同时，两节电池与C-Al和FSP-铝阳极的功率密度44.38 47.17和毫瓦厘米^-2在50mA厘米^-2，并且其差的最大2.79毫瓦厘米达到^-2。CP-Al阳极的电性能和放电性能的提高可归因于FSP诱导的CP-Al的微观结构细化和自腐蚀的降低。