Hydroflouric acid

  1. Nasty stuff . Just heard of someone having the top of a finger amputated as the result of its flesh eating properties. Wouldn't go near it but seem to remember reading a long time ago that heating some more common substance could release it - would it be viton oil seals?
     
  2. Parm

    Parm I have fun doing stuff

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    Yep nasty nasty stuff that
     
  3. johnik

    johnik Member

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    when i was doing the breakdowns, we were warned it that it was released when brake flexi hoses were burnt....nasty stuff:flame:
     
  4. Parm

    Parm I have fun doing stuff

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    In a fire or high temp situation anything made of Viton rubber breaks down to give of HF

    In F1, no one is allowed near an engine after a fire. Has to be thoroughly washed down first
     
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  5. CompoSimmonite Member

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    Mate, now retired Police officer, told me years ago they had a warning about the dangers of this acid in burnt out cars.
     
  6. Brad93

    Brad93 M J B Engineering

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    It’s in most decent pickling pastes for stainless, along with HCL
     
  7. Maker

    Maker nEw mEmBeR

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    The flesh eating properties are massively exaggerated by Breaking Bad, it is however incredibly toxic and absorbed through the skin, so don't touch it. :whistle:
     
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  8. daleyd

    daleyd Member

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    I seem to remember it was reported as being in o ring chains on motorcycles, and if they were involved in a fire it could be quite nasty, usually for people involved in recovering the bike.
     
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  9. mtt.tr

    mtt.tr Member

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    555
    Essex England
    Walked of abseiling jobs using hf based product without correct ppe and no pedestrian control
     
  10. Morrisman

    Morrisman Member

    It’s what they use for etching glass.
     
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  11. mtt.tr

    mtt.tr Member

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    555
    Essex England
    Hf makes hcl look friendly the chemical reaction with the body is fascinating.
     
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  12. mtt.tr

    mtt.tr Member

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    555
    Essex England
    Makes a mess on tin float glass as it starts removing the base residue
     
  13. Kayos

    Kayos Member

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    Is it used to make the piranha mixture? The one that will dissolve a chicken leg
     
  14. mtt.tr

    mtt.tr Member

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    555
    Essex England

    Its more what it does to the calcium in little amounts.
     
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  15. Maker

    Maker nEw mEmBeR

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    Nope, that's sulphuric acid and hydrogen peroxide.

    There's an excellent video on it from Sir Martyn Poliakoff.

    Don't watch if you've got a weak stomach.
     
  16. anto44

    anto44 Member

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    :o I know someone who made some furniture out of motorbike chain, he would burn it with a blowtorch to burn out the seals and grease before tacking each link to make the shape he wanted
     
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  17. eSCHEn

    eSCHEn Bit Wrangler

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    What an excellent video, thanks Maker :thumbup:
     
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  18. Parm

    Parm I have fun doing stuff

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    Viton is quite good. I suspect it’s widely used on all sorts.

    I suspect you more knowledgeable car and bike people will be aware of this
     
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  19. brewdexta

    brewdexta Member

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    3,652
    Yorkshire
    I bought gallons of HF acid (Neolith 625SS, 12% HF) to clean the stonework on the house. I did try it out, it worked but although I had all the correct PPE I was still quietly pooing my pants. So sold it to the guys who sand blasted the house instead. One of the guys had spent time in intensive care previously when he spilt some on himself and they thought he was going to have a cardiac arrest due to the way it searches out calcium, which apparently affects the muscles in the heart.

    However, when he tested it before buying, he refused any PPE and poured it from a full gallon container into a small vessel he was holding, what an idiot. He didn't spill it but why take the risk?
     
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  20. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

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    It is. Quite a few idiots have lost fingers and hands to it using it for graffiti as you can daub it onto glass like ink from a marker pen. The effects don’t show instantly on the body, either.
     
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