Is the bath solution used for micro-arc oxidation and anodic oxidation the same?

Same. Micro-arc oxidation is also called plasma electrolytic oxidation and anodic oxidation of bath solution. The anodic oxidation treatment of magnesium can be divided into ordinary anodic oxidation and micro-arc oxidation. The latter is also called "plasma oxidation or anode spark deposition", which is a technology developed in recent 10 years. Due to different electrolytic conditions.