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Is there a readily available alternative to sulphuric acid as the electolyte when anodising aluminium? Answered

 I'm trying to anodise aluminium at home and have managed it once, dying the aluminium afterwards in ink to get pretty colours.  Sulphuric acid is the electrolyte we used, but it is virtually impossible to get hold off, is there anything else which could be used instead

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Tombini (author)2009-10-23

Would a NaCl solution work? Obviously it would conduct the electricity due to the free ions but you might get some chlorine bubbles at the anode...
Maybe some other ionic compounds may work

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steveastrouk (author)Tombini2009-10-23

Salt and aluminium don't work at all.

Steve

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steveastrouk (author)2009-10-23

Unfortunately the alternative is chromic acid, and you really, really don't want to mess with that stuff.

Where are you ? In the UK, you can still buy battery acid, which is about the right concentration.

Steve

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