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Tool Talk Discussion Forum

DC Arc welder electrolysis

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electrolysis

08-24-2004 08:11:18




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I was just searching the internet for stuff and came across a link where a fella discussed using a DC welder at a setting of 65amps on the welder to de-rust an engine block. Anyone else do something similar? I currently use a marine battery hooked to a 10amp charger as my power supply.




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Big Jim

08-29-2004 22:46:21




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 Re: DC Arc welder electrolysis in reply to electrolysis, 08-24-2004 08:11:18  
You would definitly want to check out the duty cycle on the welder. It would need to be a fairly large unit to sustain 65 amps continuously.



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Joe M

08-24-2004 19:39:26




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 Re: DC Arc welder electrolysis in reply to electrolysis, 08-24-2004 08:11:18  
I have found for the most part that low voltage hi amp does better with the rust. It does take time, but the rust didn't form overnight either!
I have a 48 volt golf cart charger I do use to de-grease and de-paint parts. It will remove the paint off most parts in an hour or so, but you have to be very carful of how hot it gets the part. Some things can't take the heat and you can weaken them. The worst thing is that my charger, or the welder you speak of using have the power to KILL YOU! The solution container and all related pieces must be where they cannot be touched by anyone, and yet are out where the hydrogen can dissipate freely.
In the case of the block, I'd take the time to do it slow and not take the chance of the block being damaged. I have even done complete plows still in one piece, rusted beyond belief in 72 hours or so using 12 volts @ 10 amps or so. Also remember that this system works its best on "line of sight" so to get the water channels as well, will take an anode wire covered with some tubing snaked through the passages.Cut some notches in the tubing to expose the wire every inch or so, but be careful to keep the wire off the block so it won't short out. Just my opinions,learned the hard way !

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