| [ Total Views: 944 | Total Replies: 10 | Thread Id: 83534 ] |
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 LukeM
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| posted on May 8th, 2010 at 04:07 PM |
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Phosphoric Acid in Tanks?
Just wondering has anybody ever used phosphoric acid to treat rust in your fuel tanks?
If so what was it like and what did you do to seal the tank off afterwards?
I have heard of some of the products like POR-15 but I am unsure if I need to go that way as my tank isn't really bad it just has a little rust on
the inside that I want to stop getting any worse or into my filter.
Cheers
Luke
1971 S-Bug Restoration
1974 L-Bug Restoration
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greedy53
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| posted on May 8th, 2010 at 04:34 PM |
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try using just the por 15 cleaner and sealer do it once do it right
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Smiley
A.k.a.: Daniel Stephens
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| posted on May 8th, 2010 at 11:28 PM |
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| Quote: | Originally
posted by greedy53
try using just the por 15 cleaner and sealer do it once do it right
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Seconded.
Smiley 
If you said I was a Volkswagen man, you'd be right.
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68AutoBug
A.k.a.: Lee Noonan
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| posted on May 9th, 2010 at 12:16 AM |
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| Quote: | Originally
posted by LukeM
Just wondering has anybody ever used phosphoric acid to treat rust in your fuel tanks?
If so what was it like and what did you do to seal the tank off afterwards?
I have heard of some of the products like POR-15 but I am unsure if I need to go that way as my tank isn't really bad it just has a little rust on
the inside that I want to stop getting any worse or into my filter.
Cheers
Luke
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there are kits to do fuel tanks..
they shouldn't be rusty unless left dry for a long time...??
or add a small amount of oil to Your petrol?
and don't use petrol with ethanol...
once You have rust in a fuel tank it can cause problems for years...
POR 15 should fix the problem...
it has great products...
I saw an Aussie firm advertising in unique cars [i think]
that was similar to POR15... maybe cheaper??
Lee
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- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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bajachris88
A.k.a.: Chris Leete
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| posted on May 9th, 2010 at 12:29 AM |
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If you do use phosphoric acid, I dunno how long your fuel tank has been sitting for, but if its only been a little, make sure to wash it out
thoroughly and consult a chemical risk analysis report via google for phosphoric acid, there might even be a phone number on the back of the package
for info, just like medication has... if you come across the report, they list what not to mix it with and what it could do. might no be dangerous at
all ,but i can't forget that guy that ended up permanently crippled after gas mig or tig welding near some brake components taht had a little bit of
brake cleaner still on them, ended up making a nerve gas agent that left him pretty well hurt. Hate to see anyone go the same way....
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
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LukeM
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| posted on May 9th, 2010 at 11:35 AM |
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Thanks everyone for your replies. Sounds like POR-15 is good but I believe Phosphoric acid would clean it up ok and wouldn't react to the petrol but
I will have to do some more reading.
Has anybody ever tried electroplating a fuel tank? I am aware that you can use electrolysis as a good rust remover in a fuel tank but can you
electroplate one? and if so what would you use as your electrode?(copper,nickel?)
Thanks for your help,
Luke
1971 S-Bug Restoration
1974 L-Bug Restoration
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 vw54
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| posted on May 9th, 2010 at 05:45 PM |
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B 4 u use any product
pull the tank out an strip outlet pipe etc etc
give it a good wire brush or even a paint strip on the under side
get 50 or so nut n bolts any type will do even a length of chain fill wil a few liters of soapy way put nut n bolts inside tank with water n
soap and shake the hell out of it to remove any crud or possible rust
Wash it out with heaps of water and hold up to the light and check for Pin holes
NO product POR15 or what ever will fix rust or pin holes its has to be cut and welded fresh metal into place
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68AutoBug
A.k.a.: Lee Noonan
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 posted on May 10th, 2010 at 12:27 AM |
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| Quote: | Originally
posted by vw54
NO product POR15 or what ever will fix rust or pin holes its has to be cut and welded fresh metal into place
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I disagree....
POR15 does indeed fill up pinholes... etc...
I have seen chassis with pin holes and after coating with POR15
pin holes all gone...
GREAT STUFF....
Personally, I would replace the fuel tank if it has pin holes...
but rust only.... POR15
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
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 posted on May 10th, 2010 at 12:30 AM |
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| Quote: | Originally
posted by bajachris88
they list what not to mix it with and what it could do. might not be dangerous at all ,but i can't forget that guy that ended up permanently
crippled after gas mig or tig welding near some brake components taht had a little bit of brake cleaner still on them, ended up making a nerve gas
agent that left him pretty well hurt.
Hate to see anyone go the same way....
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[size=5]YIKES....
I'm now glad I don't use a TIG or MIG welder...
LEE[/size]
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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vw54
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| posted on May 10th, 2010 at 06:49 AM |
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Lee
theres no substuitute for solid metal
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psimitar
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| posted on May 11th, 2010 at 12:06 AM |
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Try hydrochloric acid that you stick in the swimming pool. Add water to the tank and then pour the acid in till you can hear it fizzing. The fizz
means it's eating the rust. 5-10 mins should be fine but depends how bad the rust is.
Do this outside and hold your breath when you go anywhere near it. Give off fumes that will make you unwell.
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