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A useful post on electrolysis


BOCN Contributor
I came across this thread elsewhere


It is a how-to-do on electrolysis. It occurred to me that it might be a handy technique for those cases where an object is really encasd in rust. Note that it can actually serve to replace metal.

I am trying to figure out the best way of removing the rust from inside a cannon barrel and am searching the interwebs vigorously.;)

For my needs, I think that this is one approach that I have to give a pass to simply because it seems to me that making the bath necessary (as well as a barrel length electrode) is a lot of effort for a questionable result.

Anyway, it does not remove material and is a pretty standard way of stabilizing sea found objects so I thought that it was worth a mention.
The process does work. For a bath try a piece of rainwater down pipe and for an electrode a length of heavy welding rod. Alternatively, you could go the phosphoric acid route. You'll still need a bath and its far more expensive than soda and needs to be used with caution.

Try 'Caswells' to see if they have any processes in their catalogue. http://www.caswellplating.com/


Tim. G.
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try adding a bit of washing powder to the electrolyte mix,,hepls break up the surface tension and works a lot better. smells better to :)