Pete.
Super Spammer
Joined: 22 Aug 2006
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Teflon-Mike
tl;dr
Joined: 01 Jun 2010
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 Posted: 23:38 - 23 Nov 2017  Post subject: |
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| Pete. wrote: | H2Oooooooooooh dear me..... |
| stinkwheel wrote: | Learn 2 chemistry.
Oxygen is water soluable. |
Oh-No-Not-Again..... you two just given me a flashack to my 3rd year at secondary school, and my causing staff-room consternation, between my Chemistry mistress, who told us quite emphatically that oxygen was colourless, odourless and non-soluble in water, which was how we could collect the bubbles of the stuff in a test-tube when we electrolysed water.. (but not see or smell it) and my Biology teacher, who insisted it WAS soluble in water... that's how fish can breath, and sea-weed photosynthesize.....
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stinkwheel
Bovine Proctologist
Joined: 12 Jul 2004
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Posted: 00:43 - 24 Nov 2017  Post subject: |
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| Pete. wrote: |
I think you missed the IRONy in my post  |
Genuinely don't know if I did. Maybe my aspbergers is playing me up?
Teffs statement was mostly correct. Up to a point, the amount of water doesn't really matter, the presence of water is what causes the problem. Strictly speaking it's not a catalyst though, it does take part in what is a hugely complex third order reaction that I wish I'd decided to leave alone when I did 6th year chemistry at school.
What I established is that desaturated water is actually a pretty effective corrosion inhibitor in a marine environment. If you dump steel stuff (I was looking at load chain on oil rigs, has to be carbon steel, is very expensive, corrodes like mad) in a barrel of water, bung a reducing agent in there to bind up the dissolved oxygen and either seal it or put a layer of oil on top, you reduce the rate of corrosion by more than tenfold.
Iron in the presence of pure, non-saturated water will not rust. It's one of the reasons they can pull 2000 year old pattern welded sword blades out of bogs in Denmark that are still sharp enough to chop your head off. The rotting vegetable matter deoxygenates the water.
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