The Jockey Journal Board

The Jockey Journal Board (https://www.jockeyjournal.com/forum/index.php)
-   The Board (https://www.jockeyjournal.com/forum/forumdisplay.php?f=2)
-   -   Muriatic Acid for Gas Tank Cleaning (https://www.jockeyjournal.com/forum/showthread.php?t=72726)

Flying Scot 09-20-2010 12:21 AM

Muriatic Acid for Gas Tank Cleaning
 

So decided to do it the old fashioned way. Some gas in the tank, nuts & bolts in there for about 15 min, mixing it around. Then the acid about 35% about 1/3 gallon, face shield, overalls, gloves etc. 30 min later after swishing around be very careful, looked good. Dumped it into some water with baking soda to neutralize it. Flushed out the tank with water/baking soda then gas. Force dried with the wife's hair drier. Looked inside, it had turned orangey / rusty when it dried, WTF. Thought I had done it correctly, what did I do wrong.
BTW already tried Rusteco, long story $90 left it for a week, don't think I had enough of it, probably needed $180 worth for my tank, it's a 6T tank I've been told, almost 5 gallons... I wouldn't pay $180 for Blue label far less weak acid..:confused:

Tito 09-20-2010 01:12 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

That orangey rust color that it turned is flash rust, brought on by water and heat from hair dryer, and lack of petroleum product of some kind to coat the fresh and clean surface. It's like when you sandblast metal, it starts to rust almost right before your eyes because it's so clean. If you had dumped a little gas with about a teaspoon of oil in it and swirled it around to cover all sides while it was nearly dry, it wouldn't be so bad. It still isn't that bad, it's just surface rust. You can probably get rid of it with some gas, just don't dump it out until you're ready to use it.

beaverbikes 09-20-2010 01:49 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

If you are going to coat a tank like that, you can do the last rinse or two with acetone and then just let it air dry.......works pretty well.

Highway Magician 09-20-2010 04:17 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

Buy some Prep & Ready from POR15.com

Surly Pirate 09-20-2010 08:22 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

Eastwood has some nice stuff. I'm gonna use this stuff on my VW and was planning to use it on my Triumph tank. BTW type in SAMBA in the coupon code and get 15% off. **This is not an advert. Just passing my hookup along**.

http://www.eastwood.com/media/catalo...6e95/p9152.jpg
http://www.eastwood.com/ew-gas-tank-...-for-cars.html

Flying Scot 09-20-2010 11:00 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

Tito, you are correct, it's like a fine powder, but seems to be stuck on there, I'll try some more gas, if I have to I'll use a little more acid & remember to rinse with the gas. Appreciate all responses.

Dusty 09-20-2010 11:16 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

If you want to remove rust from metal use Phophoric acid, not muratic.
Phosphoric acid is sold under the brand name "OSPHO".
It is also found in "Naval Jelly", and "Metal Prep".
It turns the Iron Oxide (Rust) into a hardlayer, that can be painted right over.
It is green in color, and when once treated won't rust again.


Dusty,
Orange, TX

Necron99 09-20-2010 11:45 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

Quote:

Originally Posted by Dusty (Post 645839)
If you want to remove rust from metal use Phophoric acid, not muratic.
Phosphoric acid is sold under the brand name "OSPHO".
It is also found in "Naval Jelly", and "Metal Prep".
It turns the Iron Oxide (Rust) into a hardlayer, that can be painted right over.
It is green in color, and when once treated won't rust again.


Dusty,
Orange, TX

I think that is what I used on my Norton tank.
BTW, I use a heavier petroleum product when doing the shake part with the screws. Diesel, Varsol, etc. I was worried about sparks and gasoline in the tank while doing this.
Maybe I am just over paranoid?

lackluster 09-20-2010 12:20 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

I just rinsed a super crusty tank in vinegar and it came out super shiny and sexy. I let it sit for about 48 hours and it really did a great job. The other benefit is that vinegar is very easy to dispose of when you're done with it. Its not near as harsh as muriatic acid so it doesn't flash rust quite as fast. I took some pictures of the process and I'll see if I have time to post them sometime today. I soaked it it in vinegar (mild acetic acid), neutralized it, and put it in the oven at about 200 degrees for a while just to make sure it was dry inside so it wouldn't flash rust again. Sounds like one of those urban legends, but it is by far the best thing I've found for it. Muriatic acid tends to work much faster, but flash rusts immediately and is tougher to get rid of when your done.

Coco 09-20-2010 12:41 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

Quote:

Originally Posted by lackluster (Post 645853)
I just rinsed a super crusty tank in vinegar and it came out super shiny and sexy. I let it sit for about 48 hours and it really did a great job. The other benefit is that vinegar is very easy to dispose of when you're done with it. Its not near as harsh as muriatic acid so it doesn't flash rust quite as fast. I took some pictures of the process and I'll see if I have time to post them sometime today. I soaked it it in vinegar (mild acetic acid), neutralized it, and put it in the oven at about 200 degrees for a while just to make sure it was dry inside so it wouldn't flash rust again. Sounds like one of those urban legends, but it is by far the best thing I've found for it. Muriatic acid tends to work much faster, but flash rusts immediately and is tougher to get rid of when your done.

Vinegar works great and you can dump it anywhere when done and it is cheap. I did this to my old Norton tank and it came out clean as a whistle inside. I left the vinegar sit for about 5 days as I kind of forgot about it.

Dusty 09-20-2010 12:42 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

The element in Vinegar is "Acetic Acid". It works, but has it's limits. Another item that works wonders, and is very easy to dispose of is molasses. Mix one part molasses and 9 parts water. Mix it up, say in one of those 5 gal plastic buckets, put in your parts, and let it sit overnight. You won't believe what it did. If it's really rusted (Any Part, Not just tanks) bad, it might take more than overnight. When you are through with it pour down the drain, or feed it to your cows mixed with grain.

For brass and copper fittings. Get the unsweetened Lemon/Lime "Kool Aid". Mix it with water, 4 packs of Kool Aid to a quart of water. Put in glass or plastic container. Drop in your fittings or parts, let sit overnight. Most time all you have to do is rinse off and rub with towel, and it's like new...Well almost. If you google the Molasses thing, I think you will find several articles on using it. Best thing, it's cheap and readily available...

Here is a URL to the Molasses rust removal plus several other methods of cleaning up corroded metal ...

http://www.antiqueautoranch.com/mont...rian/rust.html

Here's another site for the Molasses trick...

http://virtualindian.org/projrust.htm



Dusty
Orange, TX

Flat Ernie 09-21-2010 05:07 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

I use muriatic acid to get deep rust off. Neutralize and flush. Then a phosphoric acid rinse. I rinse with denatured alcohol to get the "dusty" / "flakey" phosphoric acid residue off.

Also, denatured alcohol is very good at removing gum in tanks - not much will touch it - even acetone seems to have limits working against gum and varnish, but denatured alcohol seems to work pretty well.

I do all my tanks, even new, with phosphoric acid...and don't use sealers.

J_F_Byrd 09-21-2010 07:17 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

Quote:

Originally Posted by Flying Scot (Post 645742)
So decided to do it the old fashioned way. Some gas in the tank, nuts & bolts in there for about 15 min, mixing it around. Then the acid about 35% about 1/3 gallon, face shield, overalls, gloves etc. 30 min later after swishing around be very careful, looked good. Dumped it into some water with baking soda to neutralize it. Flushed out the tank with water/baking soda then gas. Force dried with the wife's hair drier. Looked inside, it had turned orangey / rusty when it dried, WTF. Thought I had done it correctly, what did I do wrong.
BTW already tried Rusteco, long story $90 left it for a week, don't think I had enough of it, probably needed $180 worth for my tank, it's a 6T tank I've been told, almost 5 gallons... I wouldn't pay $180 for Blue label far less weak acid..:confused:

That orange is a very light layer of rust caused by the fact that when you cleaned the metal of heavy rust, you also etched it, which gives it a very large surface area, which will oxidize rapidly.

A couple of solutions:

A conversion coating which converts this minor surface oxidation to zinc phosphate.

Or, "quick prep", a non-rinse metal prep with an alcohol carrier designed for exactly this kind of thing.

You can get either at the autobody supply store.

I'd go with the quick prep. Do not dilute it. The metal will turn from orange to blue and assuming your tank isn't requiring a sealer, put a cup of two-stroke pre-mix in it and slosh it around if you're going to store it.

If the re-rusting is anything more than slight, re-apply the muriatic acid to get rid of it, and then use the quick prep-after rinsing and force drying.

If you're going to use a sealer, you can skip all of this, and simply dump a quart of Por15 in it, slog it around and drain.

Bodyworx 09-21-2010 07:26 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

Muratic Acid will cause your tank to almost immediately rust over if not caoted immediately. i tried it on an old Oil Tank . failure. Left sit overnight . rinsed . left to rust. Live and Learn i guess.

bombsightcycles 03-13-2013 05:54 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

trying all of the above..
thanks guys...
ray
FNG:)

Cosmo 03-13-2013 06:22 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

One last thing - never run a tank after muriatic acid etching without a coating of some sort. ANY water will cause the tank to re-rust. And ALL gasoline has water in it.

POR-15 is a good bet to coat after the flash rust, as the metal will definitely have 'teeth'.

Cosmo

panhead_pete 03-13-2013 06:48 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

Molasses rocks. Good result, safe to use and no environmental risk at disposal.

EldoMike 03-13-2013 09:07 PM

Re: Muriatic Acid for Gas Tank Cleaning
 

Milk Stone Remover....get from farm supply houses....

Daddy Boy 03-14-2013 01:41 AM

Re: Muriatic Acid for Gas Tank Cleaning
 

That Por15 tank sealer is just awesome. I cannot believe the silver finish on the inside of tank, that's after I repaired pinholes and a fingernail size hole with their repair kit. 6 or7 yrs now. Look into it.


All times are GMT -5. The time now is 12:52 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.