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Technical rust removal

Discussion in 'Traditional Hot Rods' started by roger didonato, May 11, 2018.

  1. roger didonato
    Joined: Aug 24, 2016
    Posts: 93

    roger didonato

    Any of you hambers try rust removal using molasses & water? No joke! they use this method in Australia & NZ. 7 parts water 1 part molasses. 5 gal pail of feed grade molasses at Blue Seal feeds for $20.00. I have a 275 gal. oil tank split in half & hinged. I can fit doors & fenders in.Only removes rust wont take off paint.Gets where sandblasting cant reach. just power wash the parts after.Wont harm the metal.its takes about 2-3 weeks or more depending on the rust. A friend of mine told my about this & I thought he was nuts till I tried it.
     
  2. 41rodderz
    Joined: Sep 27, 2010
    Posts: 506

    41rodderz
    Member
    from Oregon

    Yes it has been discussed a few times on here. Glad it worked for you.;)
     
  3. Couple of long threads already.
    Great except for the stink that develops.
     
  4. Molasses and Hamb go well together. A search will find some good previous discussions.
     
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  5. 36roadster
    Joined: Nov 13, 2005
    Posts: 1,616

    36roadster
    Member

    ....and them damn little flies if you don't put a lid on it when not in use!
     
  6. tubman
    Joined: May 16, 2007
    Posts: 3,548

    tubman
    ALLIANCE MEMBER

    There was a thread with a couple of posts that seemed to show that the use of molasses can produce pitting on machined cast iron surfaces. Something to think about. I prefer chellation myself.
     
  7. stanlow69
    Joined: Feb 21, 2010
    Posts: 2,658

    stanlow69
    Member
    from red oak

    I use food grade Scan0488.jpg citric acid. Used to make Kool aid.
     
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  8. tubman
    Joined: May 16, 2007
    Posts: 3,548

    tubman
    ALLIANCE MEMBER

    Citric acid will work, but you have to remember it is an acid (the batch I made up had a pH of 1.5). That means that it will eventually affect the base metal if you don't watch it. There seems to be a sense out there that citric acid works like Evaporust. This is not true; I have tested Evaporust (which works by chellation, an ion-exchange process I don't fully understand) and it has a pH of 7.
     
  9. roger didonato
    Joined: Aug 24, 2016
    Posts: 93

    roger didonato

    Food grade molasses is probably more expensive But molasses is biodegradeable I put it in my compost pile.
     
  10. justabeater37
    Joined: Jan 1, 2009
    Posts: 966

    justabeater37
    Member
    from Iowa

    Oxalic acid works if you don't want to disturb paint or old chrome. I have dumped things in that were completely orange and surprised to pull them out and see them nearly fully painted, with graphics still intact. Works great on old chrome with mild surface rust too.
     
  11. evintho
    Joined: May 28, 2007
    Posts: 949

    evintho
    Member

    20 gallons of feed grade (not food grade) molasses. 7:1 mix. Wooden box lined with an old pond liner. 2 weeks. 90 years of rust.............gone!

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
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  12. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 1,745

    Flathead Dave
    ALLIANCE MEMBER
    from So. Cal.

    o_Oo_Oo_O
    Did the neighbors call the police because they smelled the dead body?:rolleyes:
     
  13. CadMad
    Joined: Oct 20, 2012
    Posts: 418

    CadMad
    Member

    Food grade phosphoric acid is best by far. I buy full strength and dilute 10 to 1 . Doesn’t stink. It’s what give coke the “zing!”.
     
  14. stanlow69
    Joined: Feb 21, 2010
    Posts: 2,658

    stanlow69
    Member
    from red oak

    I put 30 pounds($75) in my tank with water. Doesn`t stink. Takes less than a week. Hose it off at the car wash. Doesn`t flash rust. The last batch I had was 6 months old until it froze up in the winter.
     
  15. roger didonato
    Joined: Aug 24, 2016
    Posts: 93

    roger didonato

    Mine also froze up but when it thawed its still cookin
     
  16. stanlow69
    Joined: Feb 21, 2010
    Posts: 2,658

    stanlow69
    Member
    from red oak

    My batch was 6 months old. It was frozen about 12 inches thick and lost it`s umpth. I had since bought a tank heater.
     
  17. roger didonato
    Joined: Aug 24, 2016
    Posts: 93

    roger didonato

    Mine was about 3'' Thick I know its been along cold winter, but how cold does it get in your neck of the woods?
     
  18. stanlow69
    Joined: Feb 21, 2010
    Posts: 2,658

    stanlow69
    Member
    from red oak

    It was colder than normal this year. We had more than 10 days with below 0 temps. Not including times when temps getting below zero at night.
     
  19. roger didonato
    Joined: Aug 24, 2016
    Posts: 93

    roger didonato

    Brrr! These ol bones cant take it as much as we used to.
     
    stanlow69 likes this.
  20. Citric acid is very mild and works great, no stink, cheap and harmless enough its easy to dispose of when your done.

    Sent from my SM-J727T1 using The H.A.M.B. mobile app
     
    stanlow69 likes this.
  21. I use citric acid too, I have a big tub for chassis parts, a couple of cat litter tubs for small parts, old pool filter baskets are good for hardware. I did the front of my hood using an under-bed storage container. I lashed the hood to my deck rail and gave it 10 days. I always neutralize the acid with baking soda and water.
     
  22. Where do you get the citric acid in bulk? Around here it's expensive in small quantities.
     
  23. Kan Kustom
    Joined: Jul 20, 2009
    Posts: 2,035

    Kan Kustom
    Member

    Whether or not you can take rust away on chrome is what I have been wondering about. Does it harm the chrome itself ? And where do you get oxalic acid ? I have used phosphoric acid and like it but have been afraid to use it on chrome.
     
  24. Gerrys
    Joined: May 1, 2009
    Posts: 290

    Gerrys
    Member

    Also known as wood bleach. Try your local hardware store.
     
  25. I think the ratio I used with water was somewhere between 5:1 and 10:1 it works well .When I hose off the part I spray it with POR15 Prep and Ready to stop flash oxidation. I used agricultural grade.
     
  26. I get citric acid in 5-lb bags online, shop around for it. Last one I found on Amazon. Just looked on eBay, better deals and free shipping for the most part.
     
  27. Yessir bought a zip lock bag online cheap, It goes a long way.

    Sent from my SM-J727T1 using The H.A.M.B. mobile app
     
  28. stanlow69
    Joined: Feb 21, 2010
    Posts: 2,658

    stanlow69
    Member
    from red oak

    I use sodium hydroxate for this. I leave it in my tank for about 15 minutes. I bought two 5 gallon pails and my tank is similar to the one below. I also use it to strip paint off of parts. Takes about a week. Scan0488.jpg Scan0491.jpg
     
    Last edited: May 18, 2018
  29. Kan Kustom
    Joined: Jul 20, 2009
    Posts: 2,035

    Kan Kustom
    Member

    Wow! Thanks
     
  30. Kan Kustom
    Joined: Jul 20, 2009
    Posts: 2,035

    Kan Kustom
    Member

    Thanks
     

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