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post #1 of 8 (permalink) Old 07-24-2013, 09:47 AM Thread Starter
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Vulcan 750 tank

Looking for a tank. Picked up a 1990 750 with less then 9,000 miles. Well thank has a pinhole in the bottom and inside its rusty. So I'm looking for a new tank or a way to use this one. I've heard you can acid wash them and then seal them. Anyone know how or want to sell me a tank that's not gonna break the bank?
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post #2 of 8 (permalink) Old 07-24-2013, 09:57 AM
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Send Wolfie a PM he had a tank that he was selling.
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post #3 of 8 (permalink) Old 07-24-2013, 10:56 AM
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"Acid wash" I'm assuming is phosphoric, same stuff as in ospho, rust-mort, naval jelly, or any other rust killer. Cheapest I've found is $12 + tax at the hardware store with this label:



I've checked the MSDS and it's the same as ospho. It works by dissolving the iron oxide to a softer iron phosphate which inhibits further rusting, without eating the metal.

Hopefully you find one cheap enough to avoid messing with anything.

Edit: Make sure the MSDS says phosphoric acid, not hydrochloric or "muriatic".
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post #4 of 8 (permalink) Old 07-24-2013, 11:55 AM
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An acid wash can create more problems with a pin holed tank because the acid will disolve the rust and can create more pinholes.

http://www.kreem.com/fueltankliner.html

This stuff can work pretty well to seal the tank after a acid wash, but if there are to many pinholes or they are to big it won't do anything but cost money. They also have a cleaner and etcher, acid wash, that is formulated to prep the surface for the Kreem.

Last edited by HardRock; 07-24-2013 at 11:58 AM.
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post #5 of 8 (permalink) Old 07-25-2013, 12:17 AM
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This thread: Rusty Tank Cleaning worked wonders on my tank.

However, afterwards, you'll still have the pinholes to deal with.
I've never had to do it, but the general idea of it is to heat the tank (with a propane plumbers torch??) and a small chunk of lead so that the lead melts and flows into the pinholes and then cool sealing the hole.

You're going to want to be absolutely sure there are no gas fumes left in the tank when doing this. Also, this needs to be done on clean bare metal for the lead to adhere properly. So, if there are any pinholes in a visible area, this would mean repainting as well.

If the pinhole under your tank is the only one after the acid wash, at least you could get away with a few coats of Rustoleum to cover up the metal.

......I'd rather wake up in the middle of nowhere then in any city on earth.

*2014 VN900 Custom (16,200 miles and counting)
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post #6 of 8 (permalink) Old 07-25-2013, 06:23 AM
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hi, I have a tank, burgundy colour, from a 1986, no rust, proper functioning
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post #7 of 8 (permalink) Old 07-26-2013, 12:12 AM Thread Starter
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Quote:
Originally Posted by jeankawa View Post
hi, I have a tank, burgundy colour, from a 1986, no rust, proper functioning
Wrote to you but no reply yet.
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post #8 of 8 (permalink) Old 07-26-2013, 07:21 AM
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some pics

here they are
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