Rusty Fuel Tank - treatment

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   My 715B tank was cleaned 2 years back using vinegar and looked good but now problem back with rust clogging the small pickup port . 
  Solid but rust is a problem as can't keep tank full all the time and it seems the mix of bio-diesel added to fuel now promotes moisture and rust .
 Local place says they can coat tank but  when asked on price - quoted $450 and 2 year warranty . 
 Wondering on what coating holds up to diesel .  Few years back I bought a treatment for motorcycle tanks but have not used it . See several coating advertised and like most things they require a warm area to fully process and cure products . So might be a summer job when temp stays above 70F out 
 Will clean tank with Inhibited HCL acid to prep then and go from there . 
Might also add a larger outlet to tank and a pre filter screen in case of debris in tank .
  Odd have had machine now for 30 years and only last 2 years has this become a problem . Wish there was a way to just plate the inside of the tank with zinc or copper but guess a coating is the way - if it stands up to the fuel . 

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Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41739	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Topic: Rusty Fuel Tank - treatment Posted: 28 Jan 2025 at 10:45pm
	My 715B tank was cleaned 2 years back using vinegar and looked good but now problem back with rust clogging the small pickup port . Solid but rust is a problem as can't keep tank full all the time and it seems the mix of bio-diesel added to fuel now promotes moisture and rust . Local place says they can coat tank but when asked on price - quoted $450 and 2 year warranty . Wondering on what coating holds up to diesel . Few years back I bought a treatment for motorcycle tanks but have not used it . See several coating advertised and like most things they require a warm area to fully process and cure products . So might be a summer job when temp stays above 70F out Will clean tank with Inhibited HCL acid to prep then and go from there . Might also add a larger outlet to tank and a pre filter screen in case of debris in tank . Odd have had machine now for 30 years and only last 2 years has this become a problem . Wish there was a way to just plate the inside of the tank with zinc or copper but guess a coating is the way - if it stands up to the fuel .
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

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DiyDave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gambrills, MD Points: 52314	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: 22 hours 2 minutes ago at 4:39am
	Likely an EPA reformulation of the fuel has changed how it reacts with the metal of the tank...
	Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!

KRAKMT Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 May 2010 Location: MT Points: 102	Post Options Post Reply Quote KRAKMT Report Post Thanks(0) Quote Reply Posted: 11 hours 56 minutes ago at 2:45pm
	I cleaned my tank by strapping it to a cement mixer, letting it turn over and over with stainless pins and stainless nuts of random sizes. I removed a bunch of crud but I did not coat the inside. After I reinstalled and was running, I stopped in Napa for a part and next to the counter was a cart with fuel tank coating. Could have been a sign but I missed it.

Lee Bradley Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 13 Oct 2009 Location: Kingston, WA Points: 118	Post Options Post Reply Quote Lee Bradley Report Post Thanks(0) Quote Reply Posted: 11 hours 44 minutes ago at 2:57pm
	Tank cleaning machine. https://www.youtube.com/watch?v=iYH0ikGPBSs&t=241s

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41739	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 8 hours 27 minutes ago at 6:14pm
	Cleaning it is easy part , keeping it clean after is the hard thing Need something to line the bare metal to keep the rust from reforming .
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

orangeman Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Points: 1787	Post Options Post Reply Quote orangeman Report Post Thanks(0) Quote Reply Posted: 6 hours 33 minutes ago at 8:08pm
	Coke: Was sorting through Mil Specs. on this subject and came across this -https://www.scribd.com/doc/89939485/MIL-C-4556E ; probably no longer used as there is a mention of lead chromate. Wondering if there was an update that would be useful to protect the interior of diesel fuel tanks? Orangeman

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41739	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 3 hours 39 minutes ago at 11:02pm
	Ran that link through WAYBACK MACHINE - Look up and it doesn't come up with article or site
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."