Re: [Amc-list] Citric Acid Rust Remover ... Armand's Questions

["Daniel G. Ritzinger" <danritz@xxxxxxxxxxx>]

I've experimented with a lot of various rust removal processes and methods 
of protecting raw derusted metal over the years.  For derusting, I've pretty 
much settled on sand blasting small parts (up to the size of an intake 
manifold) in my cabinet, and taking larger components (fenders, etc) to a 
place that does immersion derusting that's only about an hour's drive away. 
The best way I've come upon to protect bare metal following sand blasting: 
products containing phosphoric acid, as someone else mentioned in an earlier 
posting.  I simply spray the parts using a hand sprayer bottle (like you use 
for misting plants), and hang them to dry for a few minutes.  They end up 
with a thin, light-colored coating, a bit powdery sometimes.  They can then 
be stored for weeks (sometimes months) with no worry of rust forming.  When 
you're ready to prime/paint, you lightly respray them with the solution, 
then either wipe them down with a clean cloth and/or blow dry with 
compressed air.  I like this process because it allows me to do a bunch of 
sandblasting, then spraying/hanging the parts for later priming/painting.  I 
don't like sand blasting numerous parts and then having to hustle to get 
primer on them.  This allows me to concentrate on blasting one day, and then 
do quality priming/painting at a later time.

Specifically, one of the phosphoric acid based products that I currently 
have on hand is something called "Right Stuff - Formula #3000 - Deruster, 
Metal Conditioner, Rust Preventer".  I purchased mine at the local Advance 
Auto about a year ago; it was pretty reasonably priced.  Similar products 
are marketed as "metal prep", "metal etch", etc.  Many of them are 
concentrates, to be diluted with water before use.  These can typically be 
found at auto paint stores.

I'm a REALLY big fan of this stuff, and urge anyone dealing with protection 
of bare steel to give it a try.

Dan

----- Original Message ----- 
From: "Greg Taylor" <amundaza@xxxxxxxxx>
To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>
Sent: Tuesday, April 29, 2008 11:21 AM
Subject: Re: [Amc-list] Citric Acid Rust Remover ... Armand's Questions


> Hi Armand,
>  I got the Citric acid from an Ebay store that does canning, etc. 
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250202329976
>
>  I set the crock pot on low ... did not boil the water, just made it very 
> warm.
>
>  After the rust is removed, thoroughly rinse in water and if possible, 
> wash with soap and water or spray the parts with brake cleaner to remove 
> any residue or film.
>
>  Either coat the parts with oil (like for internal engine parts) and bag 
> them or spray them with primer (like a cylinder head, etc) or do a 
> combination of both.
>
>  Sincerely,
>  Greg Taylor :)  <><
>
>
>
> Armand Eshleman <aje1@xxxxxxxxxxxxxxx> wrote:
>  Greg,
>
> I'm very interested in this method. I am planning to do an entire engine
> after its been degreased.
> Please contact me with more details.
> Where did you find the powdered citric acid??
> What temperature did you use?
> What should be done when the process is done to preserve the metal from
> rusting again before painting??
> Armand
>
> ---------------------------------
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