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       #Post#: 2232--------------------------------------------------
       Fuel Tank: Rust Removal ==> electrolysis 
       By: patentgeek Date: November 26, 2017, 5:18 pm
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       The original fuel tank on my 1970 NF was rusted beyond recovery,
       but I managed to source a replacement tank on eBay Germany.  The
       replacement tank had some surface rust (which was disclosed by
       the seller) but was structurally sound.
       I've cleaned rusty tanks using mechanical (i.e., tumbling with
       abrasive material inside the tank) and chemical (e.g.,
       phosphoric acid, vinegar, etc.) means.  But I had never
       experimented with electrolysis, which a friend has used to
       remove rust from vintage automobile fuel tanks.  So I decided to
       give that a try.  There are a lot of on-line articles describing
       how to do this, so I won't go into the details here.  I used
       tri-sodium phosphate (TSP) as the electrolytic solution and a
       section of rebar as the anode.  I used small sections of tubing
       to prevent the rebar from contacting the tank.  Voltage was
       supplied by a 12-volt car battery attached to a battery charger.
       Results seem good!  The tank was consuming about 4 amps last
       night with lots of bubbling at the filler opening.  I left it
       overnight, and this morning there were a lot of rust
       particulates around the filler opening (rust vomit).  I drained
       the TSP solution to inspect the interior of the tank, and in
       visible areas only trace amounts of surface rust remained. I
       rinsed the tank a few times and washed out a lot of rust flakes.
       Then I poured the TSP solution back into the tank and
       re-started the process.  Current consumption was down to about
       0.6 amps and the bubbling was less frothy.  I'll probably let it
       run until current consumption drops to near zero.
       #Post#: 2233--------------------------------------------------
       Re: Fuel Tank: Rust Removal ==> electrolysis 
       By: randall Date: November 27, 2017, 3:06 am
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  HTML https://youtu.be/slRBrC_aRfg
       #Post#: 2241--------------------------------------------------
       Re: Fuel Tank: Rust Removal ==> electrolysis 
       By: banquo Date: December 13, 2017, 10:12 am
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       Sounds good PG.
       I've always fancied trying the molasses method, just because it
       sounds so unlikely... 8)
       This article is quite useful for the electrolytic method.
  HTML http://myweb.tiscali.co.uk/andyspatch/rust.htm
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