All information helps.
In an earlier post, you indicated that you were using a 24V/12V 30 A battery charger. When driving a grounded load like an anodizing setup, the actual voltage and current would be much less. If I assume you used no current limiting, the actual voltage might have been 12 V or less on the 24 setting. Did you actually measure 25 A per sq. ft.? You need to measure the voltage and current when anodizing, you are working blind if you aren't doing this.
Just curious, how did you measure a coating thickness of 0.015 mm (0.0006")?
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