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Removing rust from a motorbike's fuel tank? Answered

My dad has got a yamaha xs650 but the fuel tanks got rust in it. What solvents can I put in to remove the rust without removing the tank or messing up the fuel? The pics are of 1)in the tank 2)The motorbike 3)a blurry pic of inside the tank

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KentsOkay (author)2009-01-19
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thermoelectric (author)KentsOkay2009-01-19

Yeah, It is. It's my dad's bike and he just got an old H1 Kawasaki that he's bringing back to life.

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LuciKnows (author)2009-01-19

The rusted area is your pickle. Getting inside there is really the issue. Cause removing rust is pretty simple and there are soooo many great ways to do it.
Here is an article on how to remove rust. How to remove rust

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thermoelectric (author)LuciKnows2009-01-19

Yeah, Thanks. That is a great article.....

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Rishnai (author)2008-09-24

I'm going to be attacking a worse rust issue in a Kawasaki 700 tank sometime in the near future. 3 gallons of gas + humidity + 15 years of storage = HOLY CRAP, RUST! I'll try and post how it goes.

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killerjackalope (author)2008-08-14

You could use coca cola or molasses, if you feel like that, you can also put in the likes of ball bearings and basically shake it up using the abrasive actions to remove all the rust...

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Sunbanks (author)killerjackalope2008-08-26

If coca cola cleans rust and drains imagine what it does to your stomach...

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killerjackalope (author)Sunbanks2008-08-26

Not very much, teeth on the other hand have calcium compounds as a makeup, the acid is good at that.

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Sunbanks (author)killerjackalope2008-08-26

Ooh yeah good point O_o I don't like coke, it just tastes funny...

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My dad says he has heard that coca cola or molasses will work but he doesn't know how well, can you verify that Thanks for the response

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user

I would not use anything with sugar. I would suggest finding a vehicle restoration supplier. If not, Coke is a last resort.

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user

Yea I would but I thing i'm gonna go with reverse electro-plating

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user

That'd be good to remove the rust at the base but it would still be stuck, if there's a handy mounting point chuck in a bunch of BB's and spin the tank overnight or very fast for a while, that would get the worst of it before removing via electrolysis.

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might get my dad into trying that, I just uploaded some pics of the tank and the bike

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It would remove thicker scaling first and make it easier to remove the rest via electrolysis, plus by cleaning in between it wouldn't be as hard to get the tank clean at the end of it all...

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. Phosphoric acid is listed fourth in the ingredients for Coca-Cola. Coke will work, but it will take a while if the rust is very deep. . Wouldn't be surprised to find out it's what gives molasses its' "bite," but too lazy to look it up. . . If it's just surface rust, killerjackalope's ballbearings (or coarse sand; both would probably work best) may do the job. And much safer than working with PA (in a concentration that will work very fast).

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skunkbait (author)NachoMahma2008-08-15

PA is probably best.Ball bearings, pennies, and washers are good too. THrow a handul in and use a high pressure washer on it. You can follow that with a can of carb cleaner. Most importantly, I'd use 2 in-line fuel filters instead of just one. Carry a couple of spare filters with you, and be ready to change them often till all the rust residue is gone.

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thermoelectric (author)skunkbait2008-08-15

I think i'll try that if the other methods don't work BTW whats PA

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thermoelectric (author)skunkbait2008-08-15

Where would I get phosphoric acid?

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user

It's sold as "Naval Jelly" at hardware stores. Is this in or on the tank?

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I got some pics, sorry for the late upload

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in the tank, i'll try to get some pics 2morrow

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Rishnai (author)thermoelectric2008-08-15

By the way, wear every sort of glove you can think of whilst working with industrial acids. Very unpleasant things happen otherwise.

Phosphoric acid isn't quite as evil as hydroflouric acid, though...

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thermoelectric (author)Rishnai2008-08-15

yes thats true i think i might go with reverse electro-plating though

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Rishnai (author)thermoelectric2008-08-15

That would certanly be interesting.

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thermoelectric (author)Rishnai2008-08-15

I tested that last night on a rusted up can and it WORKED!!

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Rishnai (author)thermoelectric2008-08-15

Huzzah! I greatly dislike keeping industrial acids around, so next time I need to remove a bunch of rust, I know what I'll try.

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Goodhart (author)Rishnai2008-08-26

if the rust is on the outside of something (not applicable here inside the tank), there are a number of products that convert rust "back into iron" and then coat it to prevent reoccurrence.

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Yep, molasses gets it's bite from the same phosphoric acid but the thickness seems to pull rust off when it's moving... Again ball bearings are pretty good or even sand, if he's being extra careful you could run a solution of PA through the tank overnight to remove and very small bits of rust, then flush it several times and use skunkbaits double filter idea.

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Ooh, wait! Use a sandbalaster! That would work perfectly!

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NachoMahma (author)2008-08-14

. Phosphoric acid. Google "rust gas tank"

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Thanks, I'll have to check that out

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