In situ observations of the filiform corrosion process of die-cast AZ91D magnesium alloy were carried out in 0.1 and 0.01 M NaCl solutions (pH 8.0) through a microscale polarization technique. The changes in morphology were observed in real-time using an optical microscope. Filiform corrosion proceeded in lamellar α + β structures adjacent to β phases and sometimes in the α phase grains. The β phases remained intact after filiform corrosion.

中文翻译：

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压铸AZ91D镁合金在NaCl溶液中恒电流极化腐蚀过程的实时原位观察

通过微型极化技术在 0.1 和 0.01 M NaCl 溶液（pH 8.0）中对压铸 AZ91D 镁合金的丝状腐蚀过程进行了原位观察。使用光学显微镜实时观察形态的变化。丝状腐蚀在与 β 相相邻的层状 α + β 结构中进行，有时在 α 相晶粒中进行。丝状腐蚀后β相保持完整。