Laser Rust Remover

Discussion in 'The Projects Forum' started by LordLion, Apr 14, 2016.

  1. LordLion

    Thread Starter New Member

    Mar 31, 2016
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  2. #12

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    Nov 30, 2010
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    Can you find a 1000 watt laser diode?
    I don't think so.
    Maybe Spectra Physics will sell you a 1000 watt laser if you prove you can use it safely.
    No. They only go to 200 watts.
    How many thousand dollars do you have for this project?
     
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  3. LordLion

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    means we can't built it at home in less money
     
  4. wayneh

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    No, we can't. This would be an extraordinarily bad do-it-yourself project. It would be very dangerous, and probably impossible to get the supplies anyway. Stick to steel wool and Coca Cola.
     
  5. shortbus

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    Old school. The latest and greatest is this stuff - http://www.evapo-rust.com/
     
  6. SLK001

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    Nov 29, 2011
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    There is also the electrolysis method using water, current and sodium carbonate (washing soda).
     
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  7. wayneh

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    Have you tried it? My go-to used to be Naval Jelly but I'll try this stuff if it's better.
     
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  8. #12

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    I still have half a gallon of, "Os-fo" phosphoric acid.
    Strange, the results look just like the results of Evapo-rust.
     
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  9. wayneh

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    The MSDS claims it contains a proprietary detergent and a proprietary chelating agent. That could be a fancy word for phosphoric acid, but they would be risking a lot by shipping phosphoric acid without noting so on the MSDS.
     
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  10. shortbus

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    Ospho used to be used as a metal conditioner. Put it on bare metal before primer. Never tried it for removing rust. It is kind of like a easy version of Parkerizing, no hot tanks needed.
     
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  11. shortbus

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    Not personally, but professional metal shapers on another forum have good things to say about it
     
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  12. shortbus

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    That's kind of a slow process. Another trick if you have time to do it, is a container of molasses. Not the cooking type but the raw stuff from a feed store.
     
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  13. SLK001

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    Nov 29, 2011
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    It is slow, but it can actually reverse the rusting. Usually a soak overnight in an electrolysis solution will be enough. Just be sure to connect the electrodes in the correct polarity. One way reverses the rusting - the other way accellerates the rusting.
     
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  14. atferrari

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    Wonder how big the pieces could be and how long it could take vis-a-vis the surface to treat. What about irregular shapes?

    Looks like the liquid we used on board (sure you have big surfaces there); rust converter serving as a base for the primer. I cannot remember the brand and could not find it either in the Hempel's catalog.
     
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  15. shortbus

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    There are also, "rust converters", that change ferric oxide(rust) into another ferric compound. These converters don't remove the rust but change it into another form. Most use tannic acid instead of phosphoric acid.
     
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