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Re: Sources for Phosphoric Acid?

Subject: Re: Sources for Phosphoric Acid?
From: (Denise Thorpe)
Date: Fri, 1 Sep 95 10:50:28 PDT
> A week or so ago, I posted text from an article on metal de-rusting.  The  
> component in the best de-rusters appears to be phosphoric acid.
> Unfortunately, I can't seem to find a source for phosphoric acid (in less 
> than 55 gal drums).  Someone said the farm feed stores had acid rinse; tried 
> that.  I can always use Naval Jelly, but it would be nice to have a 5 gallon 
> bucket I could dip parts in to de rust.
> I also received an article stating that tri-sodium phosphate was a good 
> stripper, and recommended drain opener (brand name Drano) as a source of TSP. 
>  Unfortunately, I could only find Drano in liquid form, and this doesn't have 
> any kind of phosphate in it.
> Anybody know a possible source for TSP or phosphoric acid?

Paint stores sell something called TSP for dulling gloss paint before
painting over it.  Is this tri-sodium phosphate?  I thought crystal
Drano was lye.  I've used it to take the accumulated food gunk off of
antique cast iron pans.  Red Devil Lye drain opener is definitely lye.

Denise Thorpe

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