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Surface rust

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Jonathan

08-12-2002 06:10:39




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I bought a exhaust shop out and a lot of the hangers and exhaust flanges have surface rust on them. Very light. I need a good way to solve the problem. I would like to find a way to dip them in something because there are thousands of parts and working a piece at a time would take forever. Any Ideas??? Any Homemade solutions I can mix??? Something I can buy??? Any help will be great.




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Jerry S

08-14-2002 13:51:39




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
Phosphoric acid was mentioned and it will take off some rust but you must rinse it with water to neutralize and remove it but then have to oil the parts to keep it from flash rusting right away. A dairy farm supply house would have some cheaper phosphoric acid than an autoparts store as that is what they clean milk pipes with. In the meat industry, we use white oil (mineral oil) to keep the flash rusting from happening. Make sure your moisture is gone before oiling or it will not work right.

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Thomas Rodgers

08-13-2002 00:32:43




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
Phosphoric acid will help you wash the rust away (metal prep). Hydrochloric acid will turn it to an inert black compound like a primer (naval jelly). Look for these ingredients in products at Lowes or a hardware store. You can get them in a liquid that can be sprayed on. Grandpa used the vinigar trick but he would put everything in a black plastic bag full of vinigar and parts and throw it into the sun for a day or more to get the temp up.

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MarkB

08-12-2002 18:24:56




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
Use Ospho. It's available at paint stores and marine hardware stores, and is used to prepare rusty steel for painting.



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Gordon L. Butcher

08-12-2002 17:52:11




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
For dipping, the best stuff I've used is "Metal Prep". It's an etching compound used for paint preparation. I'm sure there are other names. Looks a little like anti freeze. If you use this, watch your parts. Left an old putty knife in all night once. No more blade. For heavy parts like bolts and nuts, this should pose no problem and surface rust would be gone in no time. Another good product is OXYSOLVE from the Eastwood Company. This is non toxic and seems to work about as well the "Metal Prep", but isn't quite so harsh (looks and smells the same though). It's made to remove rust but is not an etching compound. Hope this helps. Much luck.

Gordo

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Irv

08-12-2002 17:46:58




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
I would call some local plating shop. The parts can be pickled, which will remove the rust, and then dipped in a packing oil solution, which will act as a rust inhibitor. I don't think it would cost more than a couple hundred $$ . My 2c, Irv



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why?

08-12-2002 12:34:22




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
exhaust parts rust up almost as soon as you install them so why would you even bother



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Jonathan

08-12-2002 13:33:50




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 Re: Re: Surface rust in reply to why?, 08-12-2002 12:34:22  
I have about 2 thousand flanges, 2 thousand clamps, and 2 thousand or more hangers. I want to resale, they would be worth more looking good. There are so many pieces that I need to dip them because seperate handleing would take to long.



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Jerry B

08-13-2002 06:34:50




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 Re: Re: Re: Surface rust in reply to Jonathan, 08-12-2002 13:33:50  
Sounds like yoiu need to tumble clean them. Use a concrete mixer with a tub of sand and have fun.



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Glenn(WV)

08-12-2002 10:20:08




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
Naval jelly will do the trick. It will convert the rust to a paintable surface. Just brush it on. HTH



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Jeff Pack

08-12-2002 06:40:13




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 Re: Surface rust in reply to Jonathan, 08-12-2002 06:10:39  
For home-made, use white vinegar, with salt
mixed it.



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