[SEL] Anyone Ever Used Phosphoric Acid to DeRust

[Paul Maples]

Thanks Orrin, all of this has made me a bit leery. I think I will wait until 
tomorrow before trying it to see if I get any more advice or recommendations 
tonight. I also think I will ask the guys on SmokStak (some of which are 
also list members) what if any experience that they have had using 
phosphoric acid. I really appreciate your help and recommendations.

Paul

----- Original Message ----- 
From: "Orrin Iseminger" <oiseming at moscow.com>
To: "'The SEL email discussion list'" <sel at lists.stationary-engine.com>
Sent: Friday, November 10, 2006 12:09 PM
Subject: RE: [SEL] Anyone Ever Used Phosphoric Acid to DeRust


> Paul, I would feel uneasy about using the phosphoric acid at full strength
> in your oil sump.  The acid not only reacts with the rust, it vigorously
> goes after the base metal, as well.  Someone else posted a recommended
> dilution.  I suggest you use it.
>
> Yes, a paint store or the paint department of a hardware store should have
> Ospho, or a similar product.  It consists of phosphoric acid and "metal
> salts."  I don't know the chemical implication of those metal salts, but
> they certainly make a big difference.  I've de-rusted with phosphoric acid
>