Abstract Surface-porous Mg–Al alloys with different microstructures were fabricated via a new method of electrochemical dealloying in a neutral 0.6M NaCl solution. A bimodal porous structure with 47.57 ± 11.43 μm large pores and 265.60 ± 78.68nm honeycomb-like fine pores was obtained by direct electrochemical dealloying of as-cast Mg 80 Al 20 alloy. Following annealing, the eutectic structure disappeared and a bicontinuous, single-sized, porous structure with 7.10 ± 1.96 μm ligaments was created by an annealing-electrochemical dealloying approach. The porous formation mechanism is governed by selective dissolution of the α-Mg phase, which leaves the Mg 17 Al 12 phase as the porous layer framework.

中文翻译：

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在中性水溶液中制备具有不同微观结构的表面多孔 Mg-Al 合金

摘要 通过在中性 0.6M NaCl 溶液中电化学脱合金的新方法制备了具有不同微观结构的表面多孔 Mg-Al 合金。通过对铸态 Mg 80 Al 20 合金进行直接电化学脱合金，获得了具有 47.57 ± 11.43 μm 大孔和 265.60 ± 78.68nm 蜂窝状细孔的双峰多孔结构。退火后，共晶结构消失，并通过退火电化学脱合金方法产生具有 7.10 ± 1.96 μm 韧带的双连续、单一尺寸的多孔结构。多孔形成机制由α-Mg 相的选择性溶解控制，从而留下Mg 17 Al 12 相作为多孔层框架。