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Cleaning rust from tank using acid

  • Thread starter Thread starter Texas Don
  • Start date Start date
T

Texas Don

Guest
Has anyone ever done this? The inside of my tank is sloooowly being rid of the coating that was put in it over the existing rust. But I'm not having much luck at removing the rust inside the tank. I've used aquarium rocks, drywall screws and sand blasting media without pressure. I don't have a sand blasting set-up.
I do have some metal covers that I fabricated for the fuel gauge sensor and the petcock openings so blocking the tank off is no problem. Does anyone have a recommendation as to the type and amount of acid/water to use to fill the tank. I believe that this is the only way to get it all out. I have a Caswell's kit on hand to immediately coat it.
 
Wont muratic acid detsroy your paint if you get it on the outside? seems risky...
 
I've used Milkstone remover i got at the tractor supply store. Or you could just use phosphoric acid. Did not harm the outside of the tank. I used 3-4 gallons water and 1 gallon acid. Let it sit for a few days. Would swoosh the tank around every few hours. I didn't not coat the inside afterwards. I just keep gas in the tank most all the time.

I really think it came out very well. No more rust.
 
Electrolysis is also a good method for removing rust. Only gets rid of the rust and not the base metal.
 
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