General Category => Restoration Projects => Topic started by: pd on November 09, 2012, 07:36:15 PM
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This was an experiment for me . My Simplex had a bit of rust forming in the gas tank . Not too bad considering the bike is 55 years old . I'd read that different acids worked for removing rust .
I used muriatic acid to clean my XT350 tank with decent results . That tank did flash rust and I retreated it and then neutralized the acid ASAP . It still formed a small amount of flash rust . I'm running it with an in line paper fuel filter and haven't had any problems .
The Simplex tank is a bit more rare and harder to find . I was reluctant to use muriatic acid in it for those reasons . Through research , I read about oxalic acid , sold as wood bleach . Oxalic acid is a lot safer to work with , but still requires due caution ( READ THE LABEL ) . It's not nearly as toxic as muriatic acid . It does NOT harm painted surfaces . It just eats rust and leaves a protective coating on the steel after being thoroughly rinsed with water .
I used a diluted mixture from what is suggested , which is 12 ounces to 1 gallon of water . I used 12 ounces to 2 gallons of water . Being as the solution was weaker , I left the mixture in the tank twice as long and the results are shown below .
This is what I used :
(http://ecx.images-amazon.com/images/I/31rJANAvPKL.jpg)
Here's the rusted tank :
(https://s26.postimg.org/5lv37wc4p/HPIM1556.jpg)
And, here's the tank after being filled with oxalic acid for a couple of days :
(https://s26.postimg.org/4sn2t0vhl/HPIM1572.jpg)
This stuff really does work great . I'll use it from now on when treating rust .
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Tkank you for posting this :)
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I should add one finishing instruction :
After the final water rinse of the tank , use a heat gun or hair drier to thoroughly dry any remaining water .