Rust Removal using Molasses - Page 2
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  1. #21
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    Another interesting use for molasses is in casting. If you want an air drying waterbased bonding agent for sand castings, give it a try. Mix it with brick sand, or any dry sand, pack it into a steel cylinder with a styrfoam pattern. It hardens the sand like concrete.
    I have cast bronze iron and aluminum into it with decent succes. It takes a while to harden though.

    Coresil products that you can buy do the same thing, they just have specific formulas that dry faster. Co2 versions harden in minutes when exposed to pure Co2.

  2. #22
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    Make it a two-fer. If you dump molasses on your lawn, it actually drives the ants away. Doesn't kill them, but makes them leave. Supposed to work great on fire ants, I've read multiple posts on garden forums from people swearing it works.

  3. #23
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    Cool! I can derust my gastank... then dump it in the sand to send the ants away... and then pour molten metal into it... and then give the EPA the finger! This stuff is incredible... good thing it doesn't do anything else or we'd start getting spam regarding it!

  4. #24
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    Default Coke and rust removal

    Quote Originally Posted by Metalworkist View Post
    With all due respect, I don't call what Coca Cola does to metal "rust removal", it just turns things black and makes the rust look different. With Molasses we're talking making a rusty engine block look like a brand new casting, like a brand new water pump or master cyl. you'd buy at the parts store. I'll see if I can find my pics.
    Coke may not be a serious rust remover but it contains phosphoric acid as a flavor ingredient. That is the same stuff in Naval Jelly and other rust removers and converters in liquid, gel and paint form, The phosphoric acid converts the porous iron oxide into a non porous barrier coat of iron phosphate, which is black. That is the theory,anyway. That black coat acts as a primer that be painted.

  5. #25
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    Resurrecting this old thread after searching.
    I have some old, and rare, Wade W8 collets that desperately need some surface rust removal. The outside is easy enough. But the inside of the collets, well, I physically can't get in there. I remember molasses being a possibility. Other than finding a sacrificial collet and testing, any input on the molasses method with collets?

  6. #26
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    Interesting, thanks!

  7. #27
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    Reverse electrolysis is a lot quicker.......molasses you are talking weeks or months.But it does work,and smells like dark rum......mmmmm dark rum.......blackfellers ruin.....whitefellers too.

  8. #28
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    Quote Originally Posted by gglines View Post
    Make it a two-fer. If you dump molasses on your lawn, it actually drives the ants away. Doesn't kill them, but makes them leave. Supposed to work great on fire ants, I've read multiple posts on garden forums from people swearing it works.
    It does work well for ants.

    Sent from my SM-G530T using Tapatalk

  9. #29
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    I've used the Coca-cola method long before the internet was prevalent, an old rancher brought a badly rust seized engine, we filled the affected cylinders with coke and changed it regularly for two weeks. the colors changed but the rust remained. We ended up forcing the pistons out with wood blocks and a ten pound sledge.
    Since tubalcain on youtube however, I tried the vinegar freeing up rusted castings and tools with great success always just soaked one day or less mixed about 5 water -1 vinegar. just watch for FLASH rusting, really fast. Also tried evapo rust, it works but much slower than vinegar and still flash rusts, just a little slower than vinegar. next I'll try the WD40 rust remover ( I buy a lot of old tools and machines that require extensive rust removal before use) I also see the electrolysis method in my future.

  10. #30
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    Quote Originally Posted by hvnlymachining View Post
    Also tried evapo rust, it works but much slower than vinegar and still flash rusts
    Evapo-Rust doesn't cause any flash rusting. It's the opposite: it protects steel from further rusting if not washed out.

    The only negative thing about Evapo-Rust (other than price) is that you cannot use it on parts that were blackened (black iron oxide finish): the blackening will be wiped out in a short order because Evapo-Rust doesn't care what kind of iron oxide it is, rust or black oxide.

  11. #31
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    Quote Originally Posted by MichaelP View Post
    Evapo-Rust doesn't cause any flash rusting. It's the opposite: it protects steel from further rusting if not washed out.

    The only negative thing about Evapo-Rust (other than price) is that you cannot use it on parts that were blackened (black iron oxide finish): the blackening will be wiped out in a short order because Evapo-Rust doesn't care what kind of iron oxide it is, rust or black oxide.
    well I guess that was my mistake, I always rinse and dry as soon as possible, quickly followed by a shot of WD40


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