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Thread: Rust produce energy

  1. #1 Rust produce energy 
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    Hi all,

    Imagine I had an iron wire and apparatus to measure the PV (Potential Voltage) across it with equipment that is highly sensitive would I be able to read a PV increase when oxygen from the air reacts with the Iron?

    Thanks!


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    Rust will actually cause a decrease in the pontetial voltage reading as the resistance is increased. Rust and iron are two completely different compounds with different resistivity. I, however wonder what could actually be made to the iron wire so to get a higher potential voltage reading


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    Quote Originally Posted by Prudentibus View Post
    Rust will actually cause a decrease in the pontetial voltage reading as the resistance is increased. Rust and iron are two completely different compounds with different resistivity. I, however wonder what could actually be made to the iron wire so to get a higher potential voltage reading
    The research that led to this was the way in which cells use oxygen for energy, and I compare (in an extremely general way) it to any other reaction of this type such as that found in an Internal Combustion Engine and in that reaction there should be some form of voltage given off somewhere if not simply because of the heat.

    Please excuse the confused logic and twisted generalizations above, I am not a specialist in science...
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    Quote Originally Posted by fatman57 View Post
    I am not a specialist in science...
    Hmm, nobody is... Nobody really is a specialist in science... It's to broad for one man to be a specialist in. It's like, knowing every language, being number 1 at every sport, or knowing every person on the planet in person..
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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    Reptile Dysfunction drowsy turtle's Avatar
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    Since nobody else bothered to give a complete answer...

    A current will run between any two connected solutions with an electrochemical gradient: this is called an electrochemical cell. In the case of rusting, you would need an oxidizing solution with an unreactive electrode; a (preferably) anoxic solution with an iron electrode; a wire connecting the electrodes; and an electrolyte bridge between the two half-cells.

    The voltage produced would depend on the electrode potential of the other half-cell:

    Electrode potential - Wikipedia, the free encyclopedia
    Standard electrode potential (data page) - Wikipedia, the free encyclopedia



    Diagram showing how a 'cell' forms in nature when iron rusts:

    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
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    So, what would something like that produce in terms of electicity? Could it be measured? Or because there is no insulation between it is lost instantly?
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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    If you set it up as a proper electrochemical cell, the voltage should be measurable. But it really depends on the reaction at the other electrode. In the case of the 'open' system in the diagram, I doubt you'll be able to measure the voltage because the electrochemical gradient is so small.
    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
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    I'm not sure this is exactly what Fatman had in mind - Iron-Air battery - but it looks like an interesting possibility for low cost energy storage.
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    I don't see much use in it, as it requires a delicate open air system that contains water. I'd see the water evaporate before doing anything usefull in terms of energy.
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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