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Restoration & Repair Tips Board

Question about Electrolytic Rust removal.

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JayWalt

04-12-2007 12:00:24




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I have built a tub and lines it with plastic and I have my old john deere model 38 mower deck being cleaned. I'd done this on a smaller scale to 1 piece and wasnt sure about one thing.

After you get it all cleaned, there is alot of black left on the metal. It comes off, but in some places on this deck, it would be nearly impossible. Does this effect how the paint adheres? Do I have to have shiny bare steel when its done.

Thanks for any help.

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PaulW_NJ

04-14-2007 20:49:44




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 Re: Question about Electrolytic Rust removal. in reply to JayWalt, 04-12-2007 12:00:24  
The black coating is over the spots where rust has been converted by the electrolysis process. I just pressure wash it off, or abrade it off with a dark red Scotchbrite pad. I blow the surface water off with an air hose, and immediately spray Picklex20 over the surface. I"ve had parts last a year without surface rust forming. I find electrolysis works best with sheet metal. If you prefer to power wire brush, which I use primarily on cast, make sure you wipe off the cleaned surface with acetone or xylene because the wire wheel also burnishes a coating onto the metal surface and it will not prime well. Look at your rag as you wipe down and you"ll see what I mean.

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JayWalt

04-13-2007 14:53:24




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 Re: Question about Electrolytic Rust removal. in reply to JayWalt, 04-12-2007 12:00:24  
forget it, heh. I give up on this electrolysis stuff. I got one of those cup wire brushes for my angle grinder. $5 at mennard and get this, it has a 2 year warranty!! i even asked the customer service guy and he said, just keep your receipt!!. I'm gonna use the poop out of that this summer so ill get my moneys worth.



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rhouston

04-13-2007 12:42:48




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 Re: Question about Electrolytic Rust removal. in reply to JayWalt, 04-12-2007 12:00:24  
I have used electrolysis to remove rust. I scrub the parts to remove as much of the black dust as possible. I then shoot the part with rust converter (cheap spray can POR 15 imitation). I have NOT had anything painted yet but the parts that were done two years ago are still rust free. I cannot say how a standard primer will adhere to the black dust but a guess would be not as well as it should.
If I were you I would get some of the paint on POR 15 type rust converter prime the whole part with it and slob it in the tight places as best as I could. It is supposed to make a very hard durable primer coat.

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glennster

04-13-2007 10:06:37




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 Re: Question about Electrolytic Rust removal. in reply to JayWalt, 04-12-2007 12:00:24  
i'd try and get the black off as best you can. maybe pick up one of those inexpensive siphon sandblasters and try and get it clean best you can. you may have some adheson problems with that black film



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