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Old 21st May 2019, 9:44 am   #39
GMB
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Join Date: Aug 2003
Location: near Reading (and sometimes Torquay)
Posts: 2,358
Default Re: Rust removal from steel component on the cheap.

The recommended electrolyte is washing soda (sodium carbonate). Do not be tempted to use common salt as this will promote re-rusting very well indeed.

When I tried this technique I used iron as the other electrode on the grounds that I didn't want any other metal going into solution, but it gets messy as it oxidises and reduces the current. I suspect carbon would be best, or gold/platinum of course! Don't use copper or you will eventually end up copper plating the object.
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