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Molasses vs. Rust

  1. Mar 2, 2015 #1
    Hello all, I am currently doing research on the process of rust inhibition and removal using molasses but finding info is tedious (the process is slow as...........) :) Anyways, does anyone happen to know the exact science and chemical processes. Any info is appreciated. I will also be posting the findings of my experiment on this site. I have a hold of two 1920 Ford Model T pistons that are caked in rust. These are going to be submerged in molasses for quite a while. I will be using molasses to de-rust the masses! (I know there is a pun!) Cheers!
  2. jcsd
  3. Mar 2, 2015 #2
    molasses? :DD
  4. Mar 2, 2015 #3
    yes. Molasses indeed. In short, can anyone elaborate upon what (ex. citric acid, etc.) is produced when molasses ferments? Thanks!
  5. Mar 2, 2015 #4
  6. Mar 2, 2015 #5


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    Staff: Mentor

    Have you tried to search for "rust removal with molasses"? There are definitely people reporting it as working. What is the chemistry behind I have no idea, but it is an organic mixture that can contain some chelating agents, so I would not reject it just because it sounds funny.

    An important thing to consider - I would keep parts and the solution it in a sealed container, to reduce amount of oxygen dissolving.
  7. Mar 3, 2015 #6

    Quantum Defect

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    Homework Helper
    Gold Member

    Some sugars are pretty good reducing species. Maybe you are reducing the oxides at the metal surface?

    The Tollens test is a famous old reaction that used to be used to test for the presence of reducing sugars.


    You can make a lovely mirror with the silver reagent and a reducing agent:

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