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: 52317	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: Yesterday 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: 22 hours 28 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: 22 hours 16 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: 18 hours 59 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: 17 hours 5 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: 14 hours 11 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."

PaulB Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Rocky Ridge Md Points: 4835	Post Options Post Reply Quote PaulB Report Post Thanks(0) Quote Reply Posted: 7 hours 54 minutes ago at 5:19am
	Just think about the nightmare you will have when that coating turns to glue and get all through your fuel system. I've had that happen with a few professionally done gas tanks and would not even consider doing a diesel tank. I found a place locally that will solder coat a fuel tank. This works great for eliminating re-occurring rust. For a fuel tank that is square or rectangle hidden behind sheet metal it could be more cost effective to have an aluminum tank made, than the cost of cleaning and coating.
	If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY