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Old 03-15-2013, 06:30 PM   #21
joe49
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Default Re: Muriatic Acid for Gas Tank Cleaning

I'm 5 days in on vinegar, in the 69s tanks, it seems to be working, but not fast.
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Old 03-17-2013, 10:07 AM   #22
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Default Re: Muriatic Acid for Gas Tank Cleaning

Nothin to contribute to the ideas, but I just want to say that stuff like this is why JJ ROCKS!!!!!!! It is flat freakin AMAZING how much collective knowledge there is in this community
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Old 03-20-2013, 08:45 PM   #23
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Default Re: Muriatic Acid for Gas Tank Cleaning

I'm 10 days with vinegar seems like it stalled and is not finishing the job. Anyone else have it not get the varnish and all of the rust?
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Old 03-20-2013, 10:07 PM   #24
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Default Re: Muriatic Acid for Gas Tank Cleaning

Stuff like molasses and vinegar is great - if the rust isn't bad. But, it's analogous to using a tiny body hammer to pound a railroad spike; that's a job for the BFH.

For heavy rust, muriatic is the ticket. But, as has been mentioned, it WILL flash rust the inside of the tank, and if you let the fumes run rampant in the garage, it can flash rust a whole lot of other stuff... DAMHIK.

I just did a CB750 tank last summer w/ muriatic, and chased it w/ phosphoric. Then sloshed w/ gas. Now, the inside of the fuel tank is the least of the guy's worries!

-Bill
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Old 03-20-2013, 10:46 PM   #25
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Default Re: Muriatic Acid for Gas Tank Cleaning

Varnish? straight Pinesol.Especially good on carbs.
Rust, those methods listed above!
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Old 03-20-2013, 11:42 PM   #26
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Default Re: Muriatic Acid for Gas Tank Cleaning

Saw a TV show the other night that raved about a Vinegar & Baking Soda mix.
Maybe an option??
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Old 03-21-2013, 06:46 AM   #27
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Default Re: Muriatic Acid for Gas Tank Cleaning

Quote:
Originally Posted by KELD View Post
Saw a TV show the other night that raved about a Vinegar & Baking Soda mix.
Maybe an option??
this produces high volumes of CO2 foam....home made fire extingusher!!
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Old 03-21-2013, 09:25 PM   #28
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Default Re: Muriatic Acid for Gas Tank Cleaning

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Change it, put in new. Shake it every time you walk by it.
Been shaking it, and there is 5 quarts in each tank. Doesn't seem there has been enough reaction to have used up what ever change it is capable of. I'm thinking about, what is the varnish doing as it seems not to have really been affected.
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Old 03-22-2013, 01:08 PM   #29
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Default Re: Muriatic Acid for Gas Tank Cleaning

I like to use electrolysis to remove heavy scale first. Next I make a rough mixture of pool PH Down (acid in granule form) and water, dissolve it completely, then pour it in the tank. Check on it every hour to see how it's cleaning, dump and refill if you have to and in the end it will be bright silver steel.
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Old 03-24-2013, 10:33 AM   #30
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Default Re: Muriatic Acid for Gas Tank Cleaning

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Originally Posted by joe49 View Post
...there is 5 quarts in each tank.
Fill'em right to the top.
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Old 03-24-2013, 06:48 PM   #31
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Default Re: Muriatic Acid for Gas Tank Cleaning

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Originally Posted by thecarfarmer View Post
Stuff like molasses and vinegar is great - if the rust isn't bad. But, it's analogous to using a tiny body hammer to pound a railroad spike; that's a job for the BFH.

For heavy rust, muriatic is the ticket. But, as has been mentioned, it WILL flash rust the inside of the tank, and if you let the fumes run rampant in the garage, it can flash rust a whole lot of other stuff... DAMHIK.

I just did a CB750 tank last summer w/ muriatic, and chased it w/ phosphoric. Then sloshed w/ gas. Now, the inside of the fuel tank is the least of the guy's worries!

-Bill
Word. Muriatic is no more unfriendly to the environment than vinegar. Key is to use a little "base" to neutralize it. If you do, it is, as much as water. You need to seal it up quick after you etch it.
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Old 03-26-2013, 04:37 PM   #32
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Default Re: Muriatic Acid for Gas Tank Cleaning

Here is another question on this subject.
I used a mild solution of muriatic, worked well.
I want to keep inside from flash rusting.
So I guess now I'm ready for the quik prep acid (phosphoric)
I only have a gallon, the tank is about 3 gal.
Should I just dilute w/ denatured or isopropal?
Calcium,rust,lime remover mixed in?
Vinagar mixed in?
Any other options?

Also the DuPont quik prep is I have is probably 20 years old, does acid lose its effectivity over time?

Last edited by chevelle; 03-26-2013 at 05:10 PM.
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Old 03-26-2013, 05:18 PM   #33
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Default Re: Muriatic Acid for Gas Tank Cleaning

what strength phosphoric acid do you have????........it may already be a weak solution and as such shouldn't be diluted .....if its a high strength it could be diluted as only a weak solution is needed......check interweb net for exact strengths recomended....remember, Coke Cola contains phosphoric Acid and is what cleans pennys when ya leave them soaking in it over night......
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Old 03-27-2013, 11:31 AM   #34
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Default Re: Muriatic Acid for Gas Tank Cleaning

Not sure the percentage?
But I believe its made to clean, slightly etch and leave a minor coating on the surface.
I can let it sit for a week or two.
I guess ill just dilute it w/ alcohol?
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Old 03-27-2013, 01:37 PM   #35
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Default Re: Muriatic Acid for Gas Tank Cleaning

dilute with water!!!...........or (don't laugh...) Coke Cola....

you know when it's done when the surface goes Black....the black is the residual Rust inhibator layer.......
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Old 03-27-2013, 01:55 PM   #36
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Default Re: Muriatic Acid for Gas Tank Cleaning


http://www.ospho.com/
This is some cool shit. I poured over a tank that had flash rust on it and it washed away like dust with a water hose. it leaves a black Parkerized like finish that you can paint over. I use it on the inside to wash away rust and it leaves the coating so no flash rust and Gas will not affect it. Read about it on the link, I ordered it from my sisters true value hardware store but there are other dealers listed on the site. I got info from a high end painter and he uses it to do every tank he paints.
By the way this dries over night and is ready to go.
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Last edited by hilbilypanman; 03-27-2013 at 02:00 PM. Reason: old age
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Old 03-30-2013, 04:28 PM   #37
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Default Re: Muriatic Acid for Gas Tank Cleaning

I got an Indian tank that is soldered together. Will muratic acid or the phosphoric acid eat the solder? Thanks
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Old 03-30-2013, 04:32 PM   #38
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Default Re: Muriatic Acid for Gas Tank Cleaning

phosphoric acid only eats rust....it is very mild....it's used in food and soft drinks....it's in Coke Cola.....
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Old 12-23-2013, 03:08 PM   #39
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Default Re: Muriatic Acid for Gas Tank Cleaning

I second the POR 15 sealer...looks great and drys super hard..make sure u let it dry..longer the better
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