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Restoration & Repair Tips Board

Electrolysis feedback

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RedRestorer

10-25-2005 15:25:32




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Since I first heard of electrolysis as a cleaning and derusting method on this site, I feel obliged to inform you about my experience so far.
I have cleaned many rusted and/or painted parts, both cast iron and steel with great success. I'm using a 12/24 V 20 Amps battery charger. Set the voltage to 12 or 24 depending on the size of the part, so that the charger doesn't trip by reaching its Amps limit.
The electrolyte is approx. 1 tablespoon of sodium hydroxide (NaOH) per gallon of water. One or two days are sufficient to remove thick layers of paint or rust. A bronze bushing in a steel part was not hurt.
I also made a serious attempt to use electrolysis to get a half moon key unstuck from a shaft. That was in vain :-( The surface rust was removed fine but apparently the rust between key and shaft was untouched. I know it is a "line of sight" process and hence will not work on rust, which is out of sight of the sacrificial anode, but nevertheless gave it a try. If it had been successful, it would be THE trick for stuck pistons ;-(
HTH. Regards, Hendrik

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Glen in TX

10-27-2005 21:58:03




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 Re: Electrolysis feedback in reply to RedRestorer, 10-25-2005 15:25:32  
I haven't got to try out the eletrolysis stuff yet but been reading here where others have heated the stuck part or key and got melted wax to then flow back in behind it getting it loose. Might find more info on that by doing a search on waxing? Was reading about it a while back on one of the forums here.



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Wisconsin Bill

10-30-2005 20:59:11




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 Re: Electrolysis feedback in reply to Glen in TX, 10-27-2005 21:58:03  
A friend has used the melting wax trick successfully many times in the past. I guess when it cools, it expands and lubes between the parts. Have not tried myself yet, though.



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