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Electrolytic derusting

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SamMI

11-08-2001 15:04:27




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Found treads below so interesting I tried it today. Used the Arm n Hammer washing soda powder and water. Didn't seem to work at all. Had the negative battery charger lead to the part to be derusted and the positive to the scrap iron. Since I only have a small charger I wonder what you fellas are using for a charger. The meter showed about 2 amps during the process.




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big fred

11-09-2001 07:38:45




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 Re: Electrolytic derusting in reply to SamMI, 11-08-2001 15:04:27  
My guess would be that you don't have good contact on the rusty part. You will need to clean away a bit of the rust to get contact. Once you get good contact you should have small bubbles rising from the rusty part within 30 seconds or so. After cleaning a few parts the solution gets pretty disgusting, and you end up with a kind of foamy scum on top from all the bubbles. My electrode is a sheet of .040 thick stainless steel.

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Franz

11-08-2001 22:01:28




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 Re: Electrolytic derusting in reply to SamMI, 11-08-2001 15:04:27  
This isn't an instantaneous process. If you have the polarity right, small bubbles should be rising from the work piece you are trying to derust.
Another common problem some have is not making good contact with the part they are trying to derust. You need good electrical contact.
You can increase the speed by either increasing the anode surphace area, or going to a higher voltage. I've known of guys who used welders, forklift chargers, and even an antique Delco power plant.
Bottom line, unless you have good electrical contact, and adaquit anode surphace, you will only pass limited current. Also remember to clean off the crap that accumulates on the anode, or the current will drop off.

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Duke

05-11-2003 17:23:53




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 Re: Re: Electrolytic derusting in reply to Franz, 11-08-2001 22:01:28  
I have a 6/12v battery charger is that acceptable for the charger? I assume that a power source should be DC. I need to do an entire car with this process!



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