Derusting old parts

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Does anyone know or have any pics of electrostatic derusting, I know Franz has in past placed info on here or the other board.J P Streets Welding LLC
Reply:http://www.weldingweb.com/vbb/showthread...=&threadid=580
Reply:Jerry,The de-rusting proess has worked just super right up the problem of reaching into the really close tolerances of the slide being frozen inside it's host.  For removal of surface rust, this method would be hard to beat, IMO. Here's a before & after taken about 2 days into the process (see page 3 of the thread): Attached Images
Reply:By the way, Jerry - Terry Lingle discussed how he de-rustified a trailer frame on my Sad Old Saw Saga over on the Hobart Board last year.  (Everytime the subject of bandsaws comes up I think of posting that here, too.)  But Terry actually built a tank and dunked the whole dang thing in it, using his welder as a power supply.  I think his tale begins on about page 2:http://www.hobartwelders.com/mboard/...5&pagenumber=1And here is the guy that got me started (Bill Dickerson):http://antique-engines.com/electrol.asp
Reply:Jerry, where you been hidin?Solution, 1 tablespoon of Arm & Hammer WASHING soda per gallon of water.The best anode material I have found is carbon or graphite.  It works 24/7 and leaves the rust in the bottom of the tank, so you don't loose time cleaning the anodes, or loose operational speed due to coated anodes.The process works best line of sight, so to speak, so multiple anodes are often beneficial.Anode area relative to area being derusted governs both acheivable speed and amperage, but you need to be careful because you can get the solution damn HOT.Whatever you do, DON'T use stainless anodes, they make some very nasty hazmat.Also remember, this process generates Hydrogen gas, so take appropriate precautions.BTW, this is a top secret process, so place your left hand on the BLUE welder and swear never to divulge this information to anyone.Appreciation Gains You Recognition-
Reply:Franz,I currently use phosphoric acid for clean rusted parts before welding. This has worked well for me. It seems to produce the same dull grey finish that this process does. What are the advantages of this process over phosphoric acid, if any?Thanksmike
Reply:Mike,This is not an attempt to speak for Franz (God forbid  ) but to mention that this being spring, Franz is either:1. doing yard work2. plotting to avoid doing yardwork3. recovering from doing yardwork4. pretending to be doing yardwork5. promising to do yardwork6. or being punished for not doing yardworkHowever, phosphoric acid not only removes some of the rust, it also converts some of it to iron phosphate bonded to the base metal.  This can serve as a temporary rust inhibitor and primer but it also means you are welding through the iron phosphate.  I don't know whether that affects anything or not.  I'm guessing not.  And waiting with you to see what the yardman has to say about it.While we are waiting, we can ponder the meaning of this little tidbit I turned up in a Google search:  "Phosphoric acid is a polyprotic acid, that means it contains more than one acid hydrogen per molecule, this type of acid ionizes in a stepwise manner. When phosphoric acid dissolves in water there are many ions present H2PO4- + HPO42- + PO43- + H3O+ Phosphoric acid is used in the rust proofing of steel, Fe3+ ions are formed by the rusting process and these ions interact with the PO43- to form insoluble iron (III) phosphate which protects the steel beneath from further attack."
Reply:why not just throw the ugly-*** thing on the heap and go buy a new one?A true democracy is two wolves and a sheep voting on what's for lunch.
Reply:Originally posted by AAA Franz,I currently use phosphoric acid for clean rusted parts before welding. This has worked well for me. It seems to produce the same dull grey finish that this process does. What are the advantages of this process over phosphoric acid, if any?Thanksmike
Reply:Originally posted by Franz Actually Cutter, Franz was waiting patiently to get on line cause Lawn Nazi was on line planning for her convention in Phoenix this week.
Reply:She had her own line, and until the rottin ISP figured out their marketing error, we could both be on line at the same time.  I'll be damned if I'm spendin more money so she can access the net from home the half hour a month she actually does so.I already paid for her damn computer to replace the POS some pimple faced pissant sold her at Staples.Hell, I ain't even smart enough to be consulted when she goes out and buys a friggin cellphone that she can use from anyplace, except Canada when she's there.  I just get bitched out because her phone don't work from Canada.Appreciation Gains You Recognition-
Reply:Hey Franz, I've been quite busy in shop lately and to top it off I was moving to new location, so there were many days working from 5:00 am to 9:00 pm. But I'm all moved in and have a machine shop next door for a nieghbor. He, like myself has been in business for only  a couple years, and we help each other out all the time, its great.Anyhow he has all these old tools from his grandpa that are very rusted and I thought to give this process a try. Thanks guys I think next week we'll set something up.Last edited by Jerry; 05-30-2004 at 11:59 PM.J P Streets Welding LLC
Reply:Franz,Can you suggest some economical sources for the carbon or graphite and if it is line of sight as you suggest would some form of sheet material work better, than say rods?Allen
Reply:Originally posted by ralenr Franz,Can you suggest some economical sources for the carbon or graphite and if it is line of sight as you suggest would some form of sheet material work better, than say rods?Allen
Reply:I read the other thread for about 2 hours today hoping for the happy ending and man was I dissappointed to see you havent gotten that vise apart yet cutter.  I feel cheated.
Reply:Franz,Thanks. I have a small roll of Carbon Fiber material I was using for a small boat (composite construction) mast project. Had to buy more than I needed. Do you think that would work?  The filiments are very fine and would give a great deal of surface area.  Allen
Reply:Originally posted by Antibling I read the other thread for about 2 hours today hoping for the happy ending and man was I dissappointed to see you havent gotten that vise apart yet cutter.  I feel cheated.
Reply:Originally posted by Jerry Hey Franz, I've been quite busy in shop lately and to top it off I was moving to new location, so there were many days working from 5:00 am to 9:00 pm. But I'm all moved in and have a machine shop next door for a nieghbor. He, like myself has been in business for only  a couple years, and we help each other out all the time, its great.Anyhow he has all these old tools from his grandpa that are very rusted and I thought to give this process a try. Thanks guys I think next week we'll set something up.
Reply:Well, after all this talk, I had to try it. Very cool!!I went and picked up some washing soda and gathered up a very rusty Ridgid Pipe wrench and 3 files.Hooked up some #12 copper wire to the parts and clamped with some old small c-clamps. Cooked overnight. I had to clean the two sacrifical parts within that first half hour. The amperage dropped from 3 to less than 1.David
Reply:oven cleaner does wonders