removing rust from cast iron

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Brought home a 15.5" Lodge frying pan from dads.

Its in pretty good shape, but has some surface rust.

Found a "new to me" process called -> electrolysis

Pretty simple process:

 

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This method I've already used - which uses common household items - to neutralize rust.

Tried it on some drill bits, and it did a good job.

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I have a decorative cast iron 'pagoda' lantern - that I found 10+ years ago, half sunk in the mud of a farm pond - that was caked with rust.

I tried the second method yesterday, but I must have goofed on the citric acid/soda ratio

So.... Put together a 5 gal bucket electrolysis set-up this morning.

Seems to be working...

Will let it run overnight. Will probably take a few days, given the extent of the rust.

Looks exactly like this one I found online:

(Its about 10" T & 7" W, at the base)

https://www.1stdibs.com/furniture/decorative-objects/candle-holders/candle-lamps/vintage-regency-patinated-metal-pagoda-wrought-iron-lantern/id-f_39075862/



 

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So, getting back to this thread.

Finished the cast iron pagoda - rust removal.

Took a few days, but was very impressed with the end result.

Had to clean the electrodes regularly, as they get caked with the rust residue.
 
But yeah, was a neat process to learn about.