Magnetic personality

Discussion in 'Capri Chit Chat' started by eau de cologne, 15 August 2019 at 9:05 PM.

  1. eau de cologne

    eau de cologne Registered Capri Power Member

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    Hi all
    Decided to purchase a pair neodymium magnets to hold on bits brass to sit behind butt weld joints in thin metal areas as you weld them e.g. floors. They're incredibly strong its an effort to not have your fingers caught as they snap shut to any bits of steel you might be holding or close to. I decided put one directly behind a 6 mm hole to be filled with weld. The whole thing explodes with molten weld presumably because the welder is using a polarity the same as the magnet, I wonder if I reversed the polarity on the welding machine the reverse would be true, anyone know.
    Bert
     
  2. Crash & Burn

    Crash & Burn Registered Capri Power Member

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    I failed my physics course and I'm not allowed around welders, but isn't that the most perfect explanation ever for the big bang theory? :D
     
  3. Clockwork Orange

    Clockwork Orange Electrical ??? what like .. bzztt Feck !!! Staff Member Moderator

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    am probably more than poles apart from getting an answer to this one ....
     
  4. caprinerd

    caprinerd Registered Capri Power Member

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    Oh dear
     
  5. PenelopesMaster

    PenelopesMaster Registered Capri Power Member

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    Reversing the polarity would change a lot of other characteristics, I would not do that tbh. Was also told when doing welding course not to use very strong magnets either. Didn't really answer your question but might save you some time. Are you able to move the magnets a bit further away?
     
  6. PenelopesMaster

    PenelopesMaster Registered Capri Power Member

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    Magnet was more to do with arc wander so wondering if the brass either through surface contamination or something else is introducing oxygen in to the pool
     
  7. eau de cologne

    eau de cologne Registered Capri Power Member

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    Not really an explosion more like major spatter no one bit of weld made to the surface just bounces off when the wire makes contact. No spatter on the surfaces just burn marks. You move the magnet away the brass comes away making it waste of time.:(
     
  8. Clockwork Orange

    Clockwork Orange Electrical ??? what like .. bzztt Feck !!! Staff Member Moderator

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    turn the magnet around 180degrees ...


    am off to the pub !!
     
  9. eau de cologne

    eau de cologne Registered Capri Power Member

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    If sunny Lanark weren't so far to go I'd join yer
    Bert
     
    Clockwork Orange likes this.
  10. Clockwork Orange

    Clockwork Orange Electrical ??? what like .. bzztt Feck !!! Staff Member Moderator

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    you would be most welcome ... ...
     
  11. caprinerd

    caprinerd Registered Capri Power Member

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    id love a pint right now but will have to wait till tonight
     

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