Subject: RE: phosphoric acid
Author: Chris Berry
Date: May 10, 2001, 10:46 AM
Post ID: 1706669535
Mike-
Don't use that whimpy phosphoric acid ;) Use Muriatic acid. Just be
careful not to leave it in too long, or ya may have a tank made of paint
only! Farm supply places sell "milk stone remover". This acid is supposed
to leave a layer of zinc that protects from rust. I thought that it was
phosphoric acid, but I guess it isn't.
Acetone will work as good as MEK. Use whichever is cheaper.
Definitely coat the tank with a sealer afterwards!
More of my $.02
Chris in NC
'74 Eldo civ.
| From: murp-@aol.com Reply-To: Loopfram-@topica.com To: Loopfram-@topica.com Subject: RE: phosphoric acid Date: Thu, 10-May-2001 05:57:00 GMT ============================================================ Get Ready For Summer! Top Weight Loss Brands For Less! $75 Phentermine! Adipex. Xenical. Meridia. Online Pharmacy. Online Consultations. Web's Best Prices, Selection, Service. http://click.topica.com/caaab3ab1dfltb2tZVva/Pharmacy ============================================================ Mike, I used phosphoric acid on my tank when I used the brand name product 'Creme' to coat my tank, but had some problems. The supplied phosphoric acid is diluted to produce about 2.5 gallons, which is used to get rid of the rust in the tank. The instructions said that if this amount did not fill the tank, then the tank should be rotated every once in a while to get the whole tank. I did this for hours, but still had rust in the tank. I phoned the manufacturer, who told me that when the phosphoric acid is used, rust forms immediately after the acid leaves the surface, so the turning method for full coverage does not work. He said that the whole tank must be filled with the proper concentration of acid for all the rust to be removed. The above does not address your question, but I thought you could benefit from my experience. I ended up buying another whole kit (for $26) just to get the required amount of phosphoric acid. Later, when it was too late, I found phosphoric acid of the right concentration in the 'tile and floor' section of Home Depot. The "Creme" kit uses Methyl Ethyl Ketone (M.E.K.) immediately following the phosphoric acid. It is used to absorb water in the tank prior to coating with the "Creme" coating, which is some kind of polymer. I was told that it was important to rinse out the tank with the M.E.K. quickly, and to coat it with the "Creme" without letting the tank sit for more than a few minutes. So, I think it would probably not be wise to remove the rust with phosphoric acid unless you are going to coat the tank afterwards. There are some other products (one of which is Rustol made by Sudco) which will remove rust without requiring an additional coating, however this is quite expensive ($49 for enough to do a tank). If I had to do it over, I would buy one "Creme" kit for $26, and then get the additional required phosphoric acid from Home Depot. The whole thing will cost about $30. Brian '74 Eldo '78 T3 mike skaggs wrote:
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