Spark anodizing (SA) used on magnesium and its alloys can be backtracking to W.F. Higgins’s fluoride anodizing treatment [1]. In the subsequent applications about sparking anodizing on magnesium, the electrolyte recipes which contained fluoride became more and more popular. Later SA process began to exhibit some new characters, such as more diluted and environmental friendly electrolyte solution, higher application voltage and modified waveform, changeable electric polarity and pulse frequency, which significantly decreased the defects (pore, sealed cavity, micro-crack etc.) in the anodized film and greatly increased the process efficiency. Recently a lot of patented commercial spark processes for Mg and its alloys are emerging, such as Tagnite, Magoxid, Keronite etc.

中文翻译：

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碱性氟化物电解液中镁铝合金火花阳极氧化过程中氧化膜的微观结构评价

用于镁及其合金的火花阳极氧化 (SA) 可以追溯到 WF Higgins 的氟化物阳极氧化处理 [1]。在随后的镁火花阳极氧化应用中，含氟电解液配方越来越受欢迎。后期的SA工艺开始表现出一些新的特性，例如更稀释和环保的电解液，更高的施加电压和修改的波形，可变的电极和脉冲频率，显着减少了缺陷（孔隙、密封腔、微裂纹等）。 ) 在阳极氧化膜中，大大提高了工艺效率。最近涌现出许多专利的镁及其合金的商业火花工艺，例如 Tagnite、Magoxid、Keronite 等。