Thread: Has anyone used Rust Dissolver???

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.....Hi All, Has anyone ever used Rust Dissolver??? I'm looking at the one by Eastwood. Thanks, Bill

Aren't all these products just a form of Phosphoric Acid?

I have been checking MSDS forms to see the active ingredients.

I use Phix, same stuff just cheaper and available locally..... I hate paying freight and the wait!!!!!

The active ingrediant IS Phosphoric Acid.

Perhaps one of the pro painters here can comment about its use as a metal prep.

I've soaked small rusty parts in it overnight and it works well.

Buy it off the shelf as Dave suggested from you auto parts dealer.
I found it at Advance Auto.

I have beeen reseraching this cause if Phosphoric acid is the active ingredient, some of these companies are blatantly ripping us off. 1 qt for $55 is ridiculous (por-15 for example). Not sure where to buy straight up Phosforic acid, but Zep and Behr have some rust removing products whose MSDS sheets show them to be almost 50% phosphoric acid, and a gallon of the stuff is less than $10...

Odds are pretty high, as the others have said, it's phophoric acid. I bought a gallon jug at a chemical supply house some years ago and mix my on solution (3 to 1 acid/water, a little "hotter" than the premade stuff). You can buy premade at most auto paint and parts houses under the trade name "Rust Mort".

Likewise I've soaked small parts 24 hours and removed light rust. Bigger pieces I coat. Wash off excess film after it dries (24hr) with water. Here's what some splash panels looked like when done.

I just put a good coat of Ospho on my frame the other day, and it has not only protected the nice shiny areas, but in the crevices it has turned the rust I couldn't get to into a black subtance.

Yes, the active ingredient is phosphoric acid. I have used Ospho for years in the marine industry to kill rust on engine mounts, blocks, transmissions, etc. I also did the entire interior surface of my pickup truck bed with it before I put on rustlock primer. No rust has ever come back through.

Ospho is like $ 7.00 a quart, and I used about 3 oz to do the entire frame on the T the other day.


Don

Yeah, it's the same stuff that's been burning my esophagus and eating my stomach lining for 40+ years. Coca-Cola.

product list for phosphoric acid
http://householdproducts.nlm.nih.gov...tbl=chem&id=93

....Hey great THANKS all, I didn't even think of getting it locally. I just called the local auto parts store and they have it. I have a 9" Ford Nodular Iron center section that's all rusty & I want to clean it up & use it in my '32. I'll have to put a posi unit in it as it now has a spool..... And the stuff works???!!! COOL Bill

Originally Posted by billlsbird

.....Hi All, Has anyone ever used Rust Dissolver??? I'm looking at the one by Eastwood. Thanks, Bill

Try using just plain old vinigar. Works great, and only $1.39 a gallon.

Originally Posted by Weeg

Try using just plain old vinigar. Works great, and only $1.39 a gallon.

...ok I'll try that first. I know it takes stains & burns out of the frying pans that I burn.... Thanks, Bill

Originally Posted by Gusaroo

I have beeen reseraching this cause if Phosphoric acid is the active ingredient, some of these companies are blatantly ripping us off. 1 qt for $55 is ridiculous (por-15 for example). Not sure where to buy straight up Phosforic acid, but Zep and Behr have some rust removing products whose MSDS sheets show them to be almost 50% phosphoric acid, and a gallon of the stuff is less than $10...

damnnnnnnnnn i must be lucky cause i had a friend gave me a 5 gallon jug of it.

i believe u can get phosphoric acid at pool supply houses....joe

....you mean THAT'S what I dump in my pool??? he,he,he./......

Okay, bringing up the pool thing has caused me to find my "be cautious" hat. Not going to do too much of the Bill Nye the Science guy thing here but folks should be aware of dangers involved since we're just throwing this out to the world at random.

Acids are nothing to play around with, they can hurt you. And nowhere in this discussion have we talked much about concentrations. One indicator of the activity, and intensity of an acid is pH. Water, being neutral, has a pH of 7, alkalines, e.g. soaps, are numbers higher than 7 up to 14, the bigger the number the more harm they will do to you. Acids go the other way, the smaller the number, the more intense they are. Milk for example is around 6.5 pH. very mild acidic. Vinegar was mentioned, which falls somewhere in the 2.5-3 range depending on concentration. Phosphoric acid is around 2-2.5. The pool thing has me worried because my past experience with that is that acid for pools had been muratic (or muriatic) acid, which is a diluted form of hydrochloric acid. These often fall in the 0-.5 range. For instance a 10% solution of muriatic acid (meaning 90% something else, probably water) will eat a hole in your shorts in a hot hurry. A 30% solution, say, of phosphoric acid might cause some irritation, but likely won't eat through your skivies.

Rod & Custom did an article a while back about muratic acid being a cheap and readily available product to use in rust removal/control, but it was loaded with cautionary statements, and recommended a high level of dilution. Of course eye and skin protection, with any of these products, is an absolute must!!!

One of the arguments for buying preprepared commercial products is a safety margin is already built in.