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rust-ospho


 
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MI-Bill
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Joined: 30 Mar 2006
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PostPosted: Sun Nov 22, 2020 7:19 am    Post subject: rust-ospho Reply to specific post Reply with quote


I have some parts that someone grinded and sanded many years ago. they are now coated in a pretty good film of rust . debating treating with a rust remover before sanding as opposed to sanding first and then treating. Comments? quite a few parts.
 
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showcrop
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Location: Chester NH

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PostPosted: Sun Nov 22, 2020 9:34 am    Post subject: Re: rust-ospho Reply to specific post Reply with quote



It depends on what "a pretty good film" is. The rust converters work very well but they don't penetrate much. If you can scrape much off with something like the edge of a screwdriver you probably should sand or wire wheel first. On sheet metal use a twisted cup type wire wheel, and on the cast iron and heavy steel parts a #80 flap wheel.
 
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Mike(NEOhio)
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PostPosted: Sun Nov 22, 2020 1:35 pm    Post subject: Re: rust-ospho Reply to specific post Reply with quote

Evapo-Rust. Wire brush as best you can, soak and rinse.
 
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Bruce(OR)
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PostPosted: Mon Nov 23, 2020 8:07 pm    Post subject: Re: rust-ospho Reply to specific post Reply with quote

Muriatic acid, Ospho, Electrolysis, Naval Jelly, Vinegar, Pick one, pick all. I suspect it depends on what size and recesses. Treat with what? Paint?
 
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showcrop
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PostPosted: Tue Nov 24, 2020 4:58 am    Post subject: Re: rust-ospho Reply to specific post Reply with quote

CVPost-Bruce(OR) wrote:
(quoted from post at 21:07:08 11/23/20) Muriatic acid, Ospho, Electrolysis, Naval Jelly, Vinegar, Pick one, pick all. I suspect it depends on what size and recesses. Treat with what? Paint?



Bruce, some simply remove rust while othere convert it to iron phosphate. Iron phosphate is what your air impact wrench sockets are plated with.
 
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FBH44
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PostPosted: Thu Nov 26, 2020 11:08 am    Post subject: Re: rust-ospho Reply to specific post Reply with quote

Thing I like about vinegar is if you let things sit for a few days, the rust just falls off, leaves a black oxide as I recall.
 
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Tr4ckz
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PostPosted: Sun Feb 14, 2021 9:58 pm    Post subject: Re: rust-ospho Reply to specific post Reply with quote


I've been reading about using vinegar but I haven't tried it yet.
 
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showcrop
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PostPosted: Mon Feb 15, 2021 2:19 am    Post subject: Re: rust-ospho Reply to specific post Reply with quote

Tr4ckz wrote:
(quoted from post at 22:58:43 02/14/21)
I've been reading about using vinegar but I haven't tried it yet.


Tr4ckz, some acids simply remove rust while others convert it to iron phosphate. Iron phosphate is what your air impact wrench sockets are plated with.
 
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