Author Topic: Phosphoric acid-tank cleaning  (Read 14871 times)

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Offline beelsamin

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Phosphoric acid-tank cleaning
« on: September 13, 2008, 11:02:12 AM »
This post is for any Canadian members.I read all the messages re: tank cleaning, and decided to clean the gas tank with phosphoric acid,most people said Home Depot has it.I went to a Home Depot(in Canada) and they do not stock it nor do they have muriatic acid.
I'd prefer the phosphoric as it leaves a coating that slows rust re-developing.My question is,does anyone know where I can buy it in Ontario?
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

Offline mustangcar

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Re: Phosphoric acid-tank cleaning
« Reply #1 on: September 13, 2008, 11:54:37 AM »
try looking for this product in Home Depot -Phorophorc Plus made by KLEEN-STRIP also used in cleaning concrete,you try to ask the workers in Homedepot anything they are dumbfks got to look for it yourself goodluck try other hardware stores carrying that brand

Offline tbpmusic

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Re: Phosphoric acid-tank cleaning
« Reply #2 on: September 13, 2008, 12:24:30 PM »
This post is for any Canadian members.I read all the messages re: tank cleaning, and decided to clean the gas tank with phosphoric acid,most people said Home Depot has it.I went to a Home Depot(in Canada) and they do not stock it nor do they have muriatic acid.
I'd prefer the phosphoric as it leaves a coating that slows rust re-developing.My question is,does anyone know where I can buy it in Ontario?

In my area, Home Depot doesn't sell the stuff.
Do you have Tractor Supply store or Farm&Fleet in your area??  They both carry it, as it's a dairy product.

bill2
"If you can't fix it with a hammer, then it's an electrical problem"

Bill Lane
 '71 CB450 Mutant/ '75 CB200/ '81 CM200/ '71 C70M

Offline beelsamin

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Re: Phosphoric acid-tank cleaning
« Reply #3 on: September 13, 2008, 02:17:51 PM »
I asked specifically for it and they said we do not carry it in Canada,I think I'll just get the Por15 kit,it has everything included and.....it is available in Canada for about $45
Thanks guys
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

NWrider

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Re: Phosphoric acid-tank cleaning
« Reply #4 on: September 13, 2008, 02:37:32 PM »
Try a Dollar Store or even a Walmat. Take a look at a product designed to remove water scale or lime deposits or that removes rust from concrete. Even Lime Away has phosphoric acid in it. While some are weaker, any with phosphoric acid should clean the tank up, provided you've knocked the rust chunks out with something like a handful of rocks, nuts, bolts, screw, chain etc.

NWR

Offline MCRider

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Re: Phosphoric acid-tank cleaning
« Reply #5 on: September 13, 2008, 03:21:45 PM »
Try a Dollar Store or even a Walmat. Take a look at a product designed to remove water scale or lime deposits or that removes rust from concrete. Even Lime Away has phosphoric acid in it. While some are weaker, any with phosphoric acid should clean the tank up, provided you've knocked the rust chunks out with something like a handful of rocks, nuts, bolts, screw, chain etc.

NWR

I like this stuff as it has an inhibitor to protect the base metal which is paintable.  http://www.jcwhitney.com/RUST-TREATMENT/GP_2000778_N_111+10201+600016934_10101.jcw

The Dairy product is "Sterosol" but I couldn't find a web supplier. I have some I got from a Vintage Jap Motorcycle Club member. He did a bulk buy from Farm Bureau and we all bought some to clean rust from gas tanks.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Bodi

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Re: Phosphoric acid-tank cleaning
« Reply #6 on: September 14, 2008, 07:02:02 AM »
Well, they used to have it. I bought Behr concrete cleaner, this is just phosphoric acid. I can get the stock number, if you need (syill have a bit in the jug). A paint store that sells epoxy garage floor paint should have this stuff too, you need it to preclean/etch the concrete before painting.

KingCustomCycles.com

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Re: Phosphoric acid-tank cleaning
« Reply #7 on: September 14, 2008, 07:24:27 AM »
Dollar store toilet bowl cleaner.....

Offline beelsamin

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Re: Phosphoric acid-tank cleaning
« Reply #8 on: September 14, 2008, 07:46:47 AM »
And I saw the Behr cocrete cleaner and etcher but was so intent on finding "Phosphoric acid" I didn't read the label.....duh me!
I am however going to buy the Por15 bike kit which has a cleaner in it,might as well do it right.
Thanks all for the help.
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

Offline beelsamin

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Re: Phosphoric acid-tank cleaning
« Reply #9 on: September 14, 2008, 08:10:59 AM »
The tank is not bad,it was from an Arizona bike and has rust spots kind of like measles visible through the gas cap opening,I'm hoping that condition exists in the rest of the tank I can't see.
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

Offline The Gardener

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Re: Phosphoric acid-tank cleaning
« Reply #10 on: September 14, 2008, 08:50:11 AM »
Hey, kind of surprised your local HOME DEPOT doesn't carry muriatic acid. Every DEPOT in the states has it in the Garden/Pool area. Cheap too, but can be nasty, stings. Anyway try a company that sells swimming pool stuff. If that doesn't work, I know I've seen tank cleaning using electrical current, I'll look for it & post it when I find it. Unless someone already knows how.

JD
'75 CB750K
'84 CB700SC

Offline The Gardener

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Re: Phosphoric acid-tank cleaning
« Reply #11 on: September 14, 2008, 08:54:25 AM »
Wow that was quick! I went to Tips&Tricks and there it was http://www.landyzone.co.uk/lz/f38/rust-removal-using-electrolysis-63065.html

Check it out, it might work for you.

JD
'75 CB750K
'84 CB700SC

Offline beelsamin

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Re: Phosphoric acid-tank cleaning
« Reply #12 on: September 14, 2008, 10:00:15 AM »
I just went to the Canadian Tire store and they had muriatic acid so I'm treating the tank right now.
Thanks
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

KingCustomCycles.com

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Re: Phosphoric acid-tank cleaning
« Reply #13 on: September 14, 2008, 10:03:01 AM »
Be careful with the electrolysis process, it very nicely removed the chrome from a set of Springer front end springs.  I then had them powder coated so all was well.  I used the process to clean a rear brake lever on a 550 last year.  It worked well. I used a plastic 5 gal. bucket of water, a battery charger, a steel plate and baking soda in the water with a battery charger connected.  No warranty expressed or implied. ;)

First time I used the muriatic acid I didn't dilute it much and it ate completely through the tank and petcock in about an hour.  I hate the stuff.  Toilet bowl cleaner is available all over the planet and is much safer.
« Last Edit: September 14, 2008, 10:04:45 AM by KingCustomCycles.com »

Offline TwoTired

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Re: Phosphoric acid-tank cleaning
« Reply #14 on: September 14, 2008, 10:04:58 AM »
Beware of flash rust with the muratic acid.   It doesn't leave a conversion layer on the metal surface like phosphoric does.

iron + water + oxygen = iron oxide.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
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adamd9932

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Re: Phosphoric acid-tank cleaning
« Reply #15 on: September 14, 2008, 12:04:29 PM »
I recently did mine according to this guide http://kzrider.com/index.php?option=com_content&task=view&id=22&Itemid=11

I only used the muriatic acid after swishing some nuts around in the tank.  As soon as I emptied the acid, I rinsed the tank with water and then sprayed the insides of the tank with wd-40 and then let it dry.  It worked great for me, and as far as my naked eye can tell, I had no problems with rust after cleaning.

Offline beelsamin

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Re: Phosphoric acid-tank cleaning
« Reply #16 on: September 14, 2008, 12:54:16 PM »
Just finished the acid bath and I did dilute the muriatic about 4 parts water to 1 part acid,turned the tank every which way fir 2 hours,looked in the inlet and she looked really nice. Drained the tank into a pail,neutrazed the acid with baking soda. Hosed the tank out with water for 15 minutes,dried it with a hair dryer,and sprayed liberally with WD40.I'll let it sit overnite then rinse with gasoline....oh and the acid water mix I emptied out was a lovely brown colour...
1977 Suzuki GT750
1972 Honda CB750 K2
1978 Honda CB550K

mbrown67

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Re: Phosphoric acid-tank cleaning
« Reply #17 on: January 10, 2009, 04:02:31 PM »
I just completed my tank. I should have read the posts prior to doing the the tank because I did not dilute my acid. Heres what I did:

1) Removed the petcock from the tank
2) Poured acid into tank
3) Put a handful of rocks/gravel into the tank
4) swished everything around for a few minutes(remember to wear some safty gear, I did and luckily did not feel the pain acid can cause)
5) Poured the acid out into a pail
6) Pour more acid into the tank & Swished it all around
7) Let the acid sit for a minute or two slowly rotating the tank to cover all surfaces
8) Drained tank & flushed with RO water
9) Flushed tank with baking soda/water mix (I did not really measure it out)
10) Repeat 9 several times (I flushed it out with a baking soda mix two or three times)
11) Flush well with water (I used hose water because I ran out of RO and was not sure if it is better)
12) Washed out with rubbing alcohol
13) Coated with ATF (WD-40 will work as well)

The tank looked good before I coated it with ATF. I will let you know how it looks in the morning.