> 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
thorpe@kegs.saic.com
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